One of the reason of low popularity of recumbent e-bikes is no major e-bike manufacturer makes them.
See a small maker in Poland.
Dekers Hunter to idealne rozwiązanie dla tych co lubią dynamiczną jazdę w każdych warunkach. Odpowiednia moc i amortyzacja - tym jest Hunter.
www.dekers.pl
You can set the website to English.
The man uses cheap e-bike systems available in the aftermarket. No mid-drive motor (companies such as Bosch would not even speak to him because of the small production volume). He offers motors that are illegal in Europe. As boutique products, his recumbent e-trikes are very expensive. Not the good way to build a brand.
When I knew nothing of e-bikes (2019), I was tempted to buy a Dekers. Fortunately for me, my car broke on the way to the man with no obvious reason, which must have been a clear sign from Force Majeure: 'Don't do it'

Bought I the Dekers, I would have never afforded two premium upright e-bikes (I actually could eventually buy four of them).
There is also another aspect of the recumbents that makes them a less obvious choice: the construction type. My close friend is an avid rider of recumbent pedal bikes (she owns four of them and had been in the community for 14 years now). Just lately, she had a chance of getting a brand new recumbent from a boutique manufacturer. I asked her: 'Could your man make a recumbent to accommodate 38 mm gravel tyres?' Turned out, the recumbent bike geometry actually prevented building a recumbent with such big clearances. My friend is still unable to join our gravel rides and she's not happy when she is offered riding into any forest on her 1" tyres.
What else can I say?
View attachment 201493
Usually, my friend wears a helmet and doesn't go off-road