Get a portable, countertop dishwasher. It takes up about as much space as a full sized microwave, only slightly taller, than wide. Here's an example on Amazon .
I don't have that exact model, but a similar one. You pour water in the top instead of using hoses attached to a faucet. You just need the drain hose in the sink or could possibly get away with a bucket if that's easier. It won't fit huge items, but fits a damn good amount. It's perfect for a household of two. It's literally the best thing we ever did for our kitchen, which lacks a good spot for a built-in or a larger portable.
Honestly, anyone without a dishwasher should give those a look. Ours even has a sanitize cycle for fruits and vegetables.
Portable Countertop Dishwasher, 5 Washing Programs, Built-in 3-Cups Water Tank, 3D Cyclone Spray, Fruit & Vegetable Cleaning with Basket, High Temperature, Air Drying - Lights, Faucet Adapter Included https://www.amazon.com/dp/B08C6GQKQW/ref=cm_sw_r_cp_apan_i_55667A3894EZT45GV650
It definitely does! The countertops dishwashers usually have a window and I catch myself watching for a long time …Portable Countertop Dishwasher, 5 Washing Programs, Built-in 3-Cups Water Tank, 3D Cyclone Spray, Fruit & Vegetable Cleaning with Basket, High Temperature, Air Drying, Faucet Adapter Included https://www.amazon.com/dp/B08C6GQKQW/ref=cm_sw_r_cp_api_glt_fabc_S4N12VX6BGCC0HW8TY5T?_encoding=UTF8&psc=1
You could also try a portable dishwasher like this one. Never used one myself tho.
NTA she has to take care of the dishes in a communal area. However, she can buy a $300 countertop dishwasher if that makes things easier for her.
This is the one I bought.
https://www.amazon.com/dp/B08C6GQKQW/ref=cm_sw_r_apan_glt_fabc_7ND5NCDJSQHVMVRG9SMT