I am running Tor on my PinePhone, setup works just like it would work on desktop Linux. Regarding VPNs, if they use standard protocols like Wireguard or OpenVPN, you won't even need an app.
Signal is a bit difficult, I am using Axolotl, and it's ok for texting. For more read the Mobian Wiki.
I suggest you to check out the video channels of RTP, he made many videos about these topics and the PinePhone: Odysee (https://odysee.com/@RTP:9), YouTube.
Signal is a bit difficult, I am using Axolotl, and it's ok for texting. For more read the Mobian Wiki.
I suggest you to check out the video channels of RTP, he made many videos about these topics and the PinePhone: Odysee (https://odysee.com/@RTP:9), YouTube.