chess.dev is now a thing.
What is it?
There are a lot of engine competition websites, for example, there’s the one from chess.com. The issue with these is that there’s no easy way to create a simple engine and see how it performs against other simple engines. Instead, you have to first build a cutting-edge or near cutting-edge engine, then ask to have your engine included in the competition or hope someone notices it. If you are just creating a small engine for fun or learning, you likely are not going to do all that.
chess.dev tailors for this use case: small engines by people interested in learning.
As a bonus, it has small prizes and it runs weekly.