Depends if you want an alternate front-end and you can self-host, or you're looking for a third party.

For the former, I generally look at what LibRedirect has as options: https://libredirect.manerakai.com/

Proxigram seems unmaintained, but kittygram seems to be actively developed: https://codeberg.org/irelephant/kittygram

I've never had an Instagram account, and I'm trying to keep it that way.