Extended Custom Fields

Your software
My PHP version is : 7.4
My MySQL/MariaDB version is (delete as applicable): MariaDB 10.4

Your problem
My problem is :
We need to add around 300 custom fields in Mautic 4.4.4 and see that there were issues with the plugin developed called Extended Custom Fields which is not yet ported or supported for M-4.x

Does anyone have any creative ways to go about creating so many fields?