Hello,
2019 is supported, however I have found that there is an issue that causes BulkEdit to not load correctly.
It is caused by a missing feature installed on the server, see the following article for a workaround:
Common issue: SP2019 – Items in document libraries are downloaded with mime-type application/octet-stream rather than the accurate one
Workaround:
The issue can be resolved by installing the IIS 6 Metabase Compatibility windows feature either through Server Manager UI or using the following PowerShell commands:
import-module servermanager
install-windowsfeature web-metabase