as you know AUTHORIZE.NET payment method is not included in new upgrade opencart version from 4.x
I upgraded it and make it compatible for opencart 4 upgraded version
This package included two variants of authorize.net
authorize.net AIM
Authorize.net SIM
for demo
DEMO 4.x(add to cart any item and go to checkout)
Just plug and play, upload zip file from admin, enable and use it

if you have any issue, email me at dyisolco@gmail.com and support and installation is free