What is meal and beverage service like on long flights (e.g., cross-country) now in covid times?

Please update me, if you have recent travel experience:

Do they still have traditional meal service?
How does that work with mask rules?
If you take off masks to eat, what is even the point of having them on otherwise?
If meal service is reduced or eliminated, what do you do on a long flight?
If you have to bring your own food, how do you get through TSA?
And then, same question about masks.