The SMLRO E5 does appear to have a geared hub motor, so you will not have to drag the motor with your feet with the power off. Very little description on their website. If the bike has a throttle you may be cited by York Oounty; they are infamous on this website for being intolerant of e-bikes.
I would be suspicious of efficiency of the SMLOR E5 under human power. The distance between seat & crank appears to be about 16", which even with my 28" legs is way too short to have the leg nearly straight at the bottom of the stroke. Also, with those fat tires, pumping them with your legs may always be too much drag. Fat tires are limited to 25-30 psi. I ride 26"x2.1" tires, at about 45-50 psi, with rating of 65 psi available if I have too much diet soda or jugs of weed killer in the panniers or on the rack.
I am diabetic and have prevented neuropathy by losing 55 lb and pushing A1c down from 8.0 to 6.1 in the 15 years since I quit working. Only 1 g/day metformin & low sugar, medium carbs, high fiber, high vegetable fat, low meat diet are control measures. The bicycle is the major source of aerobic exercise. I gave up driving for errands without electricity until 2017, when a 25 mph headwind forced my ride home from summer camp to take 6 hours at 4.6 mph. Too much exercise! All that at 120 bpm up, and 96 F. Now I use electricity to control how much exercise I get, no matter how bad the weather. Low wind day, I only turn on electricity for up the last hills, the 66th to 77th. 3.7 hours at >100 bpm twice a week is entirely enough, plus 8 mile runs to grocery, HD or Lowes, charity resale shop or flea market for bargains.
Best of fortune in your journey back to health.
