As you know, Tor is blocked in Russia, and works only with bridges. However, I can’t find such an item in the settings or the tor settings file. What are the ways to set up Tor bridges in Umbrel?
Buy a VPS in another country that offer also VPN.
Connect your whole home network to that VPN and navigate through that IP all your devices, including your umbrel node. So your Umbrel node will have an exit point to Tor through that VPN.
Done.
+1 to @DarthCoin’s suggestion.
Here is a guide how to get the VPN implemented. It’s not easy, but doable.