Yeah warming up ton is the extra step with VPN from my experience, you gotta do it literally daily.
LLC will prolly work, I know a guy who did it, but they ask for id as well, so look into that.
I use normal nord VPN so different IP every single time, no shadow bans even with different ip each time, never mattered in my case, if your friends also get shadowbanned for so simple reasons, I donno what is going on there.
Yup might be a shadow ban, if its a new account might just just drop and create new one, not worth the effort.
Ah you are still using ios, bro get a new android one, and not samsung, they are same, I tested around a little too, no tricks works around their OS.
Let see how it goes moving forward with VPN, I might have some issues with tax info as well, let talk later about it more, gotta keep testing the VPNs for now.
And last thing, ever tried dedicated IPs?