‘Next’ do a range of men’s clothes that are suitable and available online. I have some pants with an elasticated waist that are a bit smarter than tracky bottoms yet easy to get on or off. No zips or buttons here.
(It’s still tracksuit bottoms for me around the house.)
My portable wee bottle is an old 400g peanut butter jar with lid that goes with me everywhere when I’m out. I can use it pretty discretely and it holds a full wee if necessary. It slides under my waistband with ease. yet doesn’t take up much space. (I know - spare us the detail)
I also suggest practising delaying going for a wee sometimes in order to regain some bladder control.
I truly hope I don’t earn the name ‘The Wee Man’ from here on because of my subject matter on the forum.
You can also get trousers that fasten at the sides, one side or both. Worth considering paraplegics when adapting to a length of time in a wheelchair. Just googling “trousers for paraplegics”
This is just one small example:
https://able2wear.co.uk/
A pack of 3 for £30. Able2Wear is just one UK site on the internet that cater wheelchair clothing. And youtube is a great place for life tips from paraplegics/amputees as well stroke survivors. There’s also loads on how to dress single handed.
And there is all sorts of gadgetry to assist, such as a button/zipper hook
There’s a threader at one end, but there’s a hook on the other end to hook through the zip tab and pull up.
Alternatively you could either thread a lace through the zip tab or even a key ring. Its just a matter of which one would be the easiest to manage one handed.
Personally I think the lace method would be more aesthetically pleasing