Kena Mobile, a low cost operator of TIM. Its a “welcome back” offer after I had switched to a different operator, they offered back this which was cheaper and better coverage in my area.

I pay 5.99€/month for unlimited voice and SMS, plus 200gb/month. 4G only, no 5G, but who cares.

For a little bit more (9.99€ without shopping for offers) you get unlimited* data on 5G too.

But in my mind that way too expensive.

• = only on 5G coverage, some limits apply on 4G, and its actually like 750Gb/month before they cap you anyway.

Does Sony still support unlock of bootloader at all?

You should browse XDA and telegram groups to find out one that has at least an unofficial port, then hope it will became official at some point…

Most unofficial ports works just fine. Heck I still use unofficial build for my phone even if official is available.