As a wheelchair user I would not use this ever. A 45° angle is an insane angle to attempt, even with help. ADA is 8° if I remember and no Occupational Therapist in Canada would even look at this an option. It takes away anonymity of the w/c user because they will need help. It opens up the organization or individual who installs it to lawsuits because it is dangerous. Do better!

In no particular order:

The edges will cause people to trip when used as stairs.
The ramp is far too steep to meet most accessibility law requirements. It for sure won’t meet Part M of the British regs.
Nobody should be expected to have a caregiver to go everywhere with them unless they specifically need to be accompanied. Not all of us do.
As a powerchair user, not only would I tip backwards and fall trying to climb this, I would stop dead and tip over forwards when I reached the bottom going downhill on it.
a recipe for serious injury, or worse.
What’s with putting the lever to switch between steps and ramp at ground level, where you’d not only need to be able to bend down and/or stretch to reach it, you’d also need to be able to work your fingers, or some tool you had on hand, to get underneath the lever to use it.

As a wheelchair user, this really isn’t at all accessible.