I've felt similarly, on and off, my whole career (7 years since my first SWE internship). Unfortunately I've not got the answers but I do have a thought I want feedback on.

Maybe it's ok not to love it but to be satisfied regardless. It's an in demand, well paid, flexible, reasonably interesting (even if I would never miss it) career that allows me to lead a great life in other aspects without giving up too much. Can't that be enough?

I worry that the current narrative of having to 'love' your job is damaging and causing me (and maybe you) to always be searching for the 'perfect' career which doesn't exist.