There hasn’t been a packaged release in a while. The repo updated last week, though. Not everything needs a high release cadence.

The most common alternative is probably Bottles

Quite the contrary, the commit log on Github looks pretty healthy.

On what did you base the following:

it has not been updated since a while.

Heroic Games Launcher has been improving a lot, now having install scripts like Lutris, more platforms available, and a lot less janky than it used to be.

Bottles I don’t have much experience with for games, but it’s a really good program a lot of people use, and if you like Libadwaita apps it’s pretty amazing.

If you only need Lutris as a game launcher (rather than the install scripts, WINE/Proton-GE, and such), Cartridge is a nice little GTK4/Libadwaita launcher too. But it is just that - a launcher, nothing more.