Doesn't the tooltip of the roboport reflect the upgrades? My tooltip keeps showing 4 x 1.0 MW (Robot recharge rate). I assume level 2 would show 8 x 1.0 MW?

Currently the roboport item in the inventory will not reflect the upgrades the roboports have. However you should be able to see the stats of any upgrade by setting an hotbar item and then looking at the specific roboport item

The upgrades are linear, so it goes from 4x, to 8x and then to 12x. Same goes for the speed and energy upgrades

Thanks for taking the time to respond. I will test more thoroughly because I only based my findings on the tooltip.

I tested it better and I found out what is happening. When I place roboports and start a research to upgrade them, they will be updated every 8 ticks. When I then place another roboport they are never being upgraded anymore.

I installed the mod locally and on my server.

There already is a in game item that helps with the issue with roboports not upgrading, its on the shortcuts bar (the place where blueprint buttons etc are)
Other than that, i'm still looking into the roboports that might not upgrade after placing. (Especially in big bases of 2K+ ports)

I didn't notice (rebound everything) button indeed works as intended. Many thanks for the info!