1. Would you do it?

2.   How would you do it?

3.   Would you lose creative control?

4.   What  size royalty would  you expect?

A studio is a company that makes games. They don't buy games from outsiders, generally. What you are looking for may be a publisher.

If a publisher is looking for submissions, they are going to tell you how to reach out. Example: https://www.team17.com/pitch-your-game

The answers to questions 3 and 4 are, of course, "it depends".

I might do it in the future if, and only if, I have a game in whose market appeal I am reasonably confident. Publishers are unlikely to be interested in something as aggressively unmonetizable and unmarketable as Collared Maid, but that might be different for future projects. I'd also need to have confidence in my ability to actually deliver a finished project on a fixed deadline, which for this project I do not have due to my job and various personal circumstances.

1. Would you do it?

None of my games have mass appeal so it would have to be a small studio.

2.   How would you do it?

How I did most of my art gigs, just cold emailing because I'm just like that.

3.   Would you lose creative control?

I'm sure there will be a fight over the higher ups wanting to make my games a romance VN lol

4.   What  size royalty would  you expect?

Enough for a sandwich