Just modify the way you dive - and where - if you don't want to give it up. As Bob mentioned, look into a scooter - many of them are designed to go in checked luggage. I was on a boat once with an older gentleman who had walking difficulties so used his on just about every dive to keep up with us.
Also there's several dive boats with lifts installed across the country - I'm pretty sure there's at least one in South Florida - another off NC and Akimbo here
works on one in Monterey (for veterans). So climbing a ladder is a non-issue. I'm pretty sure I've heard of one in the Great Lakes also.
Some of the bigger SE Asia liveaboards have stairs down to the waterline where you transfer to a zodiac - it would be awkward but the crew could pull you back on board one if asked.I beleve several of the Socorros boats (Solmar,Nautilus) do also but that could be high current diving.
Where you go is also a factor - ex - Curacao is mostly sandy beach entries with the reef fairly close in. Bonaire 50 mi. away is mostly rough ironshore entries - people with no limitations go down regularly there. There;s a recent thread here about using foldable canes to get in the water there. Stay away from places like Roatan or Utila where it's all boat diving and often done by panga which does put a lot of strain on your leg to reboard. Although even there - Cocoview has boats with "moonwells" in the center - submerged stairs you walk up.
The best I ever saw was the defunct Nekton - their entire dive platform could be lowered into the water you floated onto it, stood up and they raised you to the dive deck level. The only issue with them is they were very vertical so lots of stairs to move around the boat.
As mentioned - drop your gear in the water. I have a bad knee so I've regularly done that at times later in a week of diving when it starts to affect me more. I dive with integrated weights and mine are in pockets with handles on them so I usually hand them up first even if I keep my BC on my back to reboard.
They also sell webbed gloves. I've seen HSA divers who dont have legs manage in the water with those. I even thought of that for myself as I use my free hand to steady myself while filming by slowly sculling the water.
And locate HSA certified dive operations - there's several in Hawaii, the Divi Flamingo on Bonaire, Divetech on Cayman and others - some fully wheelchair accessible. Hell Cap't Gary in Tavernier was able to get Matt in the water repeatedly several years ago - he has MS and dives on a ventilator.
Contact the Diveheart people - they regularly put divers in the water with much more serious conditions than yours. It requires some accommodation - and a willing buddy but that shouldn't be hard to find. A friend of mine buddies occasionally with a paraplegic diver - she (my buddy) took special training to do do.
It's not over unless you want it to be...