use the plain camera app, and point it @ the QR code with the wifi info (you don't actually need to hit the shutter/take a picture): it should put a blue square around the QR code, which will offer you the option to connect if you touch it with your finger
Thanks Matthew, that solved it! It's ironic that I didn't even try that method because it's one of the recent features in Pixel phones and I tried to do it the old way. I underestimated the camera software used on the FLX1s. 😉