Privacy Phone Question?

Hi Paul, what do you think about this? I was recently helped by a BTC consultation company were they helped me set up a privacy phone. The thing that Im kind of wondering about is when setting up the VPN, Mulvad we did it though Tailscale and tailscale wanted a email I had a google email that we used? My question is. did I effectively make this phone not so private, or another way to say it, will Google be able to track me due to the fact that Tailscale is working through a Google gmail account?