I’m sure you’ve already found Focus but, if not, you can display all your albums in the Album Browser and click on the Focus button at the top left of the screen. There you can select Format, then MP3 and AAC.
That way, you can see all your lossy albums. You can then select each one, click the 3 dots icon and then Go to Tidal Version, if available.
You can then Add to Library, the Tidal version. Roon will always show the better quality album and hide the lossy duplicate.
I love my speakers! Hope you do too!