Please be so kind as to read my full post before responding. Since March Column Display Names are the way to go https://powerapps.microsoft.com/en-us/blog/display-names-and-guids-for-canvas-apps-graduate/ For filtering and searching, LookUp and Filter seem work with Column Display Names. However, Search does not, at the time of writing, work with Column Display Names. Also, the autocompletion for Search still shows Column Logical Names for both Sharepoint and CDS. Please also make Search work with Column Display Names.
Last tested with Session ID: 89297e1e-aa3c-4ba1-9eda-32997254f317 PowerApps 3.19053.21