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It looks for me like unmaintained hw
But this is a specific hw - a display. Their firmwares are simple and are not supposed to be updated regurarly.

They are only updated when an issue (implementation bug usually) has been found and fixed.

If you and other people have no issues, then no updates will come out. The lack of updates does not necessary mean that this is unmaintained.

For example the last FW update for XDR displays came out in 2020, just a year after the launch.
 
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