Window borders not showing in "Maximised" mode

[filo]

For the buttons

Changing top bar window buttons to right and reorder buttons

It's pretty simple to customize, all you have to do is Right click the window buttons on menu bar --> configure, there you'll see a GUI option to rearrange the buttons. Next right click menu bar and edit panel, you can then drag and position them to the right

Is there any way to move window buttons to the right of the top bar OR back to the windows itself?

Just do a rightclick on the plasmoids (the widgets) to edit settings - the top bar has 3 of those. There are settings to disable the automatic removal of the window buttons on maximize. Also you can do a rightclick on the Latte panel (where the plasmoids are located on) and reorder/remove them.

For the border maybe (but there are many other threads)

Missing "Close", "Maximize" and "Minimize" buttons in Pamac-Manager

Dont know if this will help in your situation, however, unchecking "Support borderless maximized windows" in "Configure Latte"( right click on latte dock) worked for me. [Screenshot_5]