Hello,
I am not sure in which section could I suggest a couple of features to make KDE Connect even greater -so to speak;)
for example,

1- SWITCHING through TABS
it would be great been able to switch or move through the tabs of the opened browser, lets say, when you have more than one YouTube videos in different tabs and you go to bed or are distant from your PC, it would be great having some kind of command or interface button to switch through them...

and second feature I would like suggesting is:

2- PRECISE CONTROL OF THE VOLUME LEVEL CONTROL through a NUMERIC DISPLAY
It would be great (considering that videos posted on the net might have very different volume levels) being able to precisely control the volume levels, lets say, by allowing - through a UI element that displays the exact number in which you are positioning the volume - I guess it could be nicely and neatly integrated to the functional  sliding bar the current version already has in the "Devices" tab of the "Multimedia Control" section ..
PS: this last feature would allow users to set back the volume levels the the default the user has on its PC after watching a move or before shutting the down the PC ...

Hope it makes sense, (I guess both of the features would be ok in the Multimedia Control section of the app)
Many thanks and regards,