https://github.com/Wingysam/Christmas-Community

https://github.com/generalpf/phpgiftreg/blob/master/src/README.md

https://github.com/wishthis/wishthis?tab=readme-ov-file

https://github.com/aunefyren/poenskelisten

Maybe one of these?

I know it isn’t specifically what you are looking for since it isn’t self hosted, but Things to get me is great and I’ll take any opportunity to get people off of Amazon that I can.

You could probably make a new issue in a wishlust repo that uses markdown checkboxes or something similar. Would be good if you already host Gitea or another git sever.

I wonder if something like hoarder might suit your needs and you can filter purchased based on tags