Signal-app only availabel in google play store

You can install Aurora Store and then download signal v5.51.7 same version on Google Play Store.

First install F Droid:

Capture

Then search for Aurora Store:

https://f-droid.org/en/packages/com.aurora.store/

And then search in aurora store the Signal app.

With this you will have the latest Signal version

PS: If you don’t want to use FDroid you can install Aurora Store from AppLounge