I'm new to Linux and KDE, trying to get myself comfortable.

Is it possible to get a smaller time, "show desktop" and tray icons (and in more rows)?
Have not found a way to do that yet.

See the difference between Win10 and KDE.
Picture: https://disk.yandex.com/i/ZrBQy3e-Ja6O7A

Thank you in advice.

Click the dropdown arrow icon in the systray. Click the gear icon in the dropdown panel, change size of icons. Then click items entry and set which ones to show always, never etc... If I recall correctly, there used to be a more windows like "grouped systray icons" thingie..widget, but I can't find it right now. https://imgur.com/a/VJUwY8l

I use KDE Neon with KDE 5.25. There is not option about icon size anymore.

I managed to get 3 rows, but still the tray is huge, compared to Win 10...

Pic: https://disk.yandex.com/i/jiRansoskOVpaA

I'm on 5.25 as well. The size option is still there ( at least, on this one there is). And for that size..like I said, I remember some grouped systray widget but...today my gray matter is still in a dayafter party shock. https://imgur.com/a/nJ1pbg0

Sure I have it set to small. But actually it is still huge. Have searched as well for the widget, but luck finding it.

As well as no solutions to maker the HUGE clock and "show desktop". Actually, the show desktop I do not need (Super-D us working fine), so I will remove it.

I use a different "clock" as you can see. A much better one imo. https://store.kde.org/p/998901/