Speaking as someone who constantly shares text betweem phone and pc exclusively using QR codes, I wrote my own scripts to
* write a QR with clipboard content: https://git.sommerfeld.dev/dotfiles/tree/home/.local/bin/wqr
* read a QR and put the content in the system clipboard: https://git.sommerfeld.dev/dotfiles/tree/home/.local/bin/rqr
To read and generate qr codes on android, I use BinaryEye