I once put a T/C ladder/vernier tang sight on a T/C Hawken and she'd shoot one ragged hole 5-shot groups at 50-yards. It certainly can be done ... but knowing your load and accuracy works otherwise too, with a fixed sight.
The muzzleloader will be used to shoot a 4 distances. It will be best to have an adjustable rear sight with those distances marked. I have not found a sight made for that rifle. But I'm thinking that another can be made to work.
I had the same idea decades ago... I abandoned the idea.....to many problems to fix. The angle of tang drop didn't match any of the sights I could find so some custom milling would have had to be done, as well as finding or making a metric tang screw so that hole could be utilized.
And they weren't allowed at most of the shoots.