If the sim isn't KYC'd, the plan will be. That's why I stick with Tracfone, you just buy the phone, add time and go.
I'd love to go for a custom ROM like Graphene but Tracfone tends to favor Samsungs (and I have to say I vastly prefer their hardware to Pixels). I figure for now, my solution of using Canta to get rid of a lot of the spyware, while replacing as much as possible with FOSS alternatives is the best avenue for me. If I could afford to have a second phone, I'd just get a separate one for privacy purposes but I can't afford to even upgrade my phone (which is technically EoL) let alone buy a second phone.