Shor.by is the most simple URL shortener and link in bio link in the world, no account is needed, just temporary URLs free to use.
With shorby you will not be able to see stats and manage your link, you can create links with no account and then grab your sharing link.
No account is needed, free use and poor design but max anonymity and privacy, in 1 minute you will have a decent and working link in bio link.