Probably yes, EUFAB is specified with a weight limit of 30 kg. Focus Jam is approx. 21 to 22 kg without battery, depending on the version. EUFAB is quite sturdily built and the footprint is quite large.

Probably yes. The Jam2 with aluminium frame is 25 kilos with battery and the frame should also have room. However, you would have to know your bike specifications yourself first. The rest is quite detailed in the product specifications.