Tailscale and other VPN tools sometimes break WSL DNS by modifying /etc/resolv.conf wrong.
Turn off auto-generation of /etc/resolv.conf by creating /etc/wsl.conf with the following content:
[network]
generateResolvConf = false
Restart WSL for PWSH:
wsl --shutdown
Create a new /etc/resolv.conf with the following content:
nameserver 8.8.8.8
nameserver 1.1.1.1
nameserver 100.100.100.100
search XXXXX.tailscale.net YOURSEARCHDOMAIN
Replace XXXXX.tailscale.net with your Tailscale domain and YOURSEARCHDOMAIN with your search domain.
Restart WSL again.