Hi! We run DailySounds, a free sound effects site: https://dailysounds.org
There are 1,150 sounds so far, including UI clicks and beeps, coins and power-ups, hits and impacts, explosions, weapons, sci-fi, horror, animals, footsteps and other foley, and ambience beds. Every sound has its own page where you can preview it in the browser and download the MP3, with no account and no download limit.
The sounds are free to use in commercial games too. Credit is appreciated but not required. License: Sound License — Free for Personal & Commercial Use | DailySounds
The files are MP3, so they import straight into Godot as AudioStreamMP3. We add a new sound every day.