Site to Site, Cant ping full network range

Hello, I have configured tailscale for site to site using subnet routing (https://tailscale.com/kb/1214/site-to-site).

I can ping the ubuntu vm on each side but not the rest of the network ranges, so ubuntu1 can ping ubuntu2 private IP but not other devices, I have setup the ip forwarding but slightly confused.

Thanks

Hi!
My understanding is that for other devices on one subnet to access another, you need to "add a next hop static route that points the other subnet to the client you have tailscale installed on on the gateway of that subnet. But I did so (I think), and still nothing can’t get through.
Wonder if you solved this yet? Any hint would be greatful.
Thanks