Any particular reason to have landscape on the left in the dialog and second in the text_func ?
(Given that portrait is the main / most popular orientation, it feels it should be/read first.)

Three reasons:
-lesser value is the first: 10 / 14
-in rotation menus landscape is the first: ⤹ 90°, ↑ 0°
-we place more frequently used buttons in the right part of dialogs (Apply)

But, maybe it should be discussed: #12640 (comment)

Indeed first portrait then landscape is more typical.

I'm fine with having another setting for landscape.
About the reasons, I thought only about the 3rd - but this "rule" makes more sense on "dynamic" or everyday popups (dict result, highlight dialog, ConfirmBox jumping at you) where we want to avoid accidental too-quick tap or bounce. For this setting one, it's not as needed.
The first 2 reasons are less convincing :) (higher value is the first could work too :))

Let's start from Portrait as well?

No problem with this one. Best here to have the 2 landscape on each side of the main portrait one - and the useless inverted portrait far away.

Thank you very much @hius07 !
I will test it this evening

Works like a charm!
I set 20 P and 15 L, and it looks great on PW6's 7-inch screen :)
20/15 is because the screen ratio is roughly 4/3, so the item-height stays about the same in this proportion