@MrT10001 Yes, I did install the Android EU ROM stipulated on the installer and on the device page, which by the way has both links, for Global ROM and for EU ROM, still pointing to the same EU ROM, as I noted in this other post. Besides, in that same other post, I also briefly described a circumvention that I had to do for the installation, since my phone was the 't-mobile' variation of the oneplus nord n100.
Do you believe that this wi-fi issue is due to the fact the device is the 't-mobile' variation?