Hi,

I hope this question is related with Saudi/Zatca localization. If yes, currently Odoo is taking the confirmation date of the invoice to generate the QR code. The confirmation date is the date time in which the invoice is posted to the accounting, if you feel this logic is wrong as per zatca policy, create a support ticket to odoo and report it, so that Odoo team will update the logic.

Mean while if you need to fix from your side, you can create custom module and inherit and modify the logic of this function: _compute_qr_code_str in this module: l10n_sa_invoice

Thanks