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Openwrt generally works great on x64 PCs. Thiss machine will most likely be more beefy than your home router and could become your main firewall. It can handle adblocking and vpn client for all PCs on the network as well or whatever your need, as openwrt can do many nice things no commercial router can do out of the box. Install openwrt on your home router as well and use that as access point (connected via cable). You will improve your wifi signal as well. If your machine does not come with rj45 lan ports, install usb3 to rj45 adapters to the usb3.0 ports. They will give you the full 1000 mbit speeds.
There is also an aftermarket solution, if you are not on gos, three name is duress on droid.
If you still want the comfort to open your phone via biometrics plus disable biometrics in emergencies there is private lock (fdroid). It will engage when the phone is shaken, e.g. a thief grabs it from your hand while you are typing, or you shake so nobody can force you to open it by fingerprint. The device will be locked and biometrics disabled until you unlock it again. There is also a recently updated app on fdroid with the same features, but it was not as reliable for me so I went back to using private lock.