So simple, I feel like an idiot now - I tried long-press, browsed all the menus etc...
...but
when I sync to DJI cloud all those logs come back! I wanna remove them permanently, so when I use multiple tablets and sync flights to my account, only the ones I wanna keep should be included, not the ones I removed.
So same question - level 2 - can I remove flight logs from DJI cloud?