A staple of American-Italian fast food and American in-restaurant cuisine (not-so-fast), Chicken Parmesan - and, subsequently, Eggplant Parmesan - is prime comfort food when you want to go out without putting too much thought into what you want to eat when ordering.
First thing to consider is time. How much time do you want to dedicate to cooking? While you can personally hand-craft each component of the dish, yeah, that's not happening for the average VTuber. Doubly so when food delivery is an epidemic within the community that should be confronted.
If you can boil a pot of water without overflowing and burning, you can cook the spaghet. Put a pot of water on the stove to medium heat, and when it begins bubbling, add your spaghet of choice, and cook until it is as hard or soft as you would like to eat; the longer it's boiled, the softer the noodles become. There's plenty of variations in spaghet and spaghet accessories, including zucchini noodles, potato pasta, the key is to find something that you would enjoy the taste of. You might not get it on the first go-around, but experimentation in smaller pasta dishes can assist in helping you find your preferred taste. To start out with, however, focus on something you can get in a box, that you can visibly see from the casing within - for legal purposes I can't recommend any specific brands, but unless your eyes are actively working against you, there are entire shelves of this stuff in grocery aisles that you can't miss. Pick the one that looks the best to you. Also consider investing in a strainer, so that you can pour the spaghet into it to drain the water after boiling.
If you have an air fryer, you can crisp freshly cleaned and prepared chicken, if not outright fry it to your preferred consistency. If you don't have one, wrong. Do you want a non-breaded chicken breast that you can powder with parmesan when the entire dish is plated? It's got you covered, just be sure to season with salt and pepper for a few seconds each - you'll be able to "feel" when it's seasoned by using your natural senses, just like your grandmama would tell you. Would you prefer chicken tendies that are crisped with parmesan? It's got you covered. For the latter, cover the tendies with the powdered cheese in the air fryer basket, just be sure to clean up the grease afterward. Powdered parmesan is just a personal preference of mine, you can very much put the chicken together with non-powdered parmesan, just cook until melted. You can also fry up the chicken in a pan and create your own, custom breading, but I have seen enough horrors from VTubers in pan-related incidents that I am not going to recommend it until there is a global improvement in cooking.
Do you have a sense of smell and taste? Then you can add flavoring to your favorite can of marinara (with cooking instructions on the can/jar), also in grocery aisles, because chances are you don't have the time to craft artisanal homemade sauce. Three words, repeat after me: Garlic, Oregano, Lemon Juice. Three more words: Salt, Pepper, Basil. Three additional words: taste until seasoned. Although I can give you ratios of each ingredient to use, while cooking the sauce in a sauce pan, add bits and pieces of each seasoning, taste, repeat until satisfied. You can also use ingredients and seasonings that I don't mention, I'm not a fed (real).
OPTIONAL: Can you fry eggs and bacon? If so, you can turn the dish into a Carbonara. If not: crack two eggs into a small bowl, whisk with a fork until yellow, microwave until solid (~45 seconds, add 15 second increments if still wet). An air fryer can also crisp bacon, experiment with timing and temperature for your preferred consistency. Transfer the spaghet into the eggs and bacon, mix evenly - it is okay to crumble the bacon and dice up the scrambled eggs into the pasta, in fact, that's ideal. Alternately, replace bacon with bacon bits for additional time saving, but freshly cooked bacon tastes infinitely better.
Do you have eyes that are still working? Then you can plate chicken parmesan - just make sure your eyes aren't bigger than your stomach, or you'll add your dinner to the leftovers. Plate in the following order: Spaghet, Sauce, Chicken. Dust with powdered parmesan to taste, add some red pepper flakes for spice. Serve with buttered toast with garlic salt, and a light salad of your choosing. Eat your vegetables, they're good for you. Add pecans and apples with a light raspberry vinaigrette if you have a sweet tooth.