This is a video on howto install a kitchen sink drain, in an RV. Most RVs use a plastic version of the same metal drain in the kitchen sink in your sticks & bricks home.
The drain
https://amzn.to/3yQpxT9
The screen
https://amzn.to/3JOSPb3
Plumber’s drain tool
https://amzn.to/44HBO9W
Silicone sealer
https://amzn.to/3urXF9u