This morning I had my first puncture on my e-bike, inconveniently as I was heading to my "Stoutness Exercises" session. I was thus 20 minutes late, and I pushed the bike home again afterwards.
I have now learned the procedure for removing the rear wheel. It is necessary to disconnect the cable that controls the Rohloff's electronic shifting, then remove the QR skewer, detach the drive belt, and Bob's your uncle.
Removing a Schwalbe "Johnny Watts" tyre was difficult. The bead and the rim seem somehow to click together. I managed it in the end, but there was foul language. The offending body was an industrial style gun-staple. I hard a pop-bang noise but it wasn't until about half a mile later that I realised that the tyre had deflated.
Getting the tyre back on again was also problematic, and that too required a fair old lubrication of profanities (being careful not to spill them on the brake disk).
So I think I would now feel moderately confident of fixing a puncture in the wild, but it's by far the hardest combination of rim and tyre that I've ever had to deal with.