You could try an inward slopping insole for your shoes/slippers as I did.
Yes, I still have a touch of foot drop but the foot rolling outwards has definitely been resolved. I was over 2yrs post strong when I first had the idea that I needed a sole that would turn my foot inward so I didn’t end up breaking my ankle or worse in a fall. But I fixed it myself! I got enough pairs to fit one is each shoe/slipper, the left one left soles I could turn upside down, so none were wasted.
https://www.amazon.co.uk/Comfort-Cushioning-Orthopedic-Correction-Alignment/dp/B08ZJ2CPDV
I got just the heel slopped ones initially and the were useless as the didn’t stop the lower half of my foot from rolling. So then I just got one pair of the above to begin with and just tested it out around the house initially. There was definitely a marked improvement in stability from day one. So I got a few more pairs and put one in all my footwear. My foot did ache in particular after long walks but that was a small price to pay for stopping my foot from rolling over and the aches eventually stopped the more I did 
They didn’t cure my foot drop but it is certainly more manageable without it wanting to turn over. I use them all may footwear for about 8mths, now I only have one in my gym trainers and my foot doesn’t roll.
Bear in mind, if you do get any, you will most likely have to removed any thick insole your footwear already has, but don’t throw them away 
If you go down this route, be careful which insoles you get because many only slope at the heel. I wanted them to tip all they along the outer side of the foot from heel to toe, sloping inward. The ones in the pic above I got on Amazon for about £12 at the time but it looks like they’ve gone a bit. But see how its thick all down the outside but thin down the inside; that’s what you are looking for.
Lorraine