I'm looking for privacy focused backup alternatives as an iPhone user. What does the forum suggest?

Thank you for your suggestions. The issues are that I don’t have any spare PC laying around. I will look into TrueNAS however, with me being somewhat less tech literate I will also be eyeing out HexOS.

TrueNas is free afaik so it is looking to be the one I go with. Lots more research will need to be done by me.