SharePoint 2019 feature id and feature list you can find out using powershell. You will understand basic powershell commands related to Get-SPFeature so as to get sharepoint feature id details and features related ot this sharepoint feature id. Follow step by step procesure to find out how to get sharepoint 2019 features id and features.
I remembered once faced an error where user having Contribute permission to folder in the library but getting access denied. This issue in entire site collection. User with unique permission to list, folders are not able to view the page. The issue resolved by changing ViewFormPagesLockDown feature to Disable. Below article describes all about the information about ViewFormPagesLockDown feature Unable to setup uniquely secured permission.