You can put any text into an QR Code.
Very common are URLs or WIFI settings.
Create WIFI connection QR Code
$ python
Python 3.12.12 (main, Feb 10 2026, 09:46:30) [GCC 8.5.0 20210514 (Red Hat 8.5.0-28)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import segno
>>> wifi_str = "WIFI:T:WPA;S:<SID>;P:sUperSecure;H:false;;"
>>> qrcode = segno.make_qr(wifi_str)
>>> qrcode.save("WIFI.png", scale=10)
>>>