Is umbrel wallet a bitcoin wallet?

Umbrel is a LND wallet, aezeed.
If you want to import the seed into another app you can use Bluewallet or Zap Desktop.
Also you can import it into Sparrow but using a tool like
https://guggero.github.io/cryptography-toolkit/#!/aezeed that generate the master private key to be imported into Sparrow.

Nevertheless I DO NOT RECOMMEND to do that. Do not use your node wallet in the same time as you use it with your node and another app. You could mess up UTXOs and anchor outputs, messing around with your LN channels.

Use those apps ONLY when your node is dead and you need to restore it.
As I described in this dedicated guide.

You have been warned!