Now is function "List file in folder" has limit with 20 items. I as user need select all files in folder, without limit.
I agree this should be modified.
A workaround I found for this issue was to use a Sharepoint library.
You could plausibly copy the contents of a OneDrive library to a SharePoint Library and then use Get Files (properties only) to iterate through all files in a Sharepoint Library.
Every time I try to use Flow/Logic app for something serious and I run into these type of issues, seems like Microsoft makes products only for demo purpose, not serious production use, why else would you have a ridiculous limit of just 20 items per folder for list step, with no way to increase it.