Memo about custom firmware? No. I did see the bit about Google blocking sideloading. True, I don't follow Google/Android news as closely as I follow Apple news due to that being what I use.
That said, I know a fair bit about Android and used to do custom firmware. I know it's never been easy, largely due to the carriers getting involved. I thought Pixels were unlocked though, at least those bought direct. In the early days when they were Verizon exclusive, the carrier bought ones were locked (this was 2016). Custom firmware in the last 5-10 years? I know a lot less about that.