While migrating WordPress site from local environment to server or server to server All in one wp migration is one of the best options,
But the problem is it has an upload limit of 512M which is not enough while working with a large project. To exceed this limit it offers a paid solution.
Increasing PHP and httaccess file upload limit doesn't work on it.
To extend this we have to use an older version of this plugin
I recommend Version 6.77 because after that this plugin restricted some features that are use full.
After installing this, Goto
wp-content > plugins > all-in-one-migration > constant.php
Change this value according to your need
PS: values are in bytes
Oola your upload limit is extended.