INFORMATION:

TYPO3 12 version of be_acl extension: https://github.com/p2media/typo3-ext--be-acl

Installation

In your composer.json add in section repositories following:

{
    "type": "vcs",
    "url": "https://github.com/sourcebroker/be_acl.git"
}

Then run composer req sourcebroker/be-acl:^3.0.