I, personally, am not a compact camera UW photographer...

This camera looks to be an alternative to the common Sony and Canon compact cameras used UW?

https://www.dpreview.com/articles/9011490317/panasonic-l10-2026-tour-controls-changes

DivePhotoGuide

Nauticam Announces Housing for the Panasonic Lumix L10

It is very similar to the LX100/LX100II. I had 10 yrs ago the LX100 and it was a very good compact camera for underwater use especially for video. I just hope the LX10 does not have the LX100 plague i.e. a non dustproof lens barrel as it was an expensive repair to have the sensor cleaned.

Interesting choice of name, which reminds me of the unmentioned Lumix LX10 which I still currently use for video. It's excellent for that (more practical than the LX100 series), within its limitations.
This new model seemed to have upped the game, at last:

It can shoot 4K video in either DCI or UHD aspect ratios at up to 120p, or 5.6K DCI-shaped video at up to 60p, or 4:3 'open gate' 5.2K footage at up to 60p.

The video modes make use of the same multi-aspect approach as stills modes do, so the 5.2K footage is taken from a much taller region of the sensor than the ∼17:9 5.6K video, making it tall enough to extract 2160 x 3840 (vertical 9:16 4K) crops, if you're using it to deliver both horizontal and vertical video from the same capture.

On the dust issue:

The original LX100 developed something of a reputation for sucking dust into its sensor, in part because pocket cameras tend to be carried and used in wide, varied and challenging conditions. Panasonic said they made efforts to reduce this risk with the Mark II, and we've heard fewer complaints from users of the newer model. No further claims were made about the L10, so it's likely to be worth remembering that it's not fully sealed (it has an extending zoom, after all), but shouldn't be as susceptible as the Mk 1 was.