Smaller tyre will give a bigger gap between tyre and chainstay so chain can’t get trapped although it shouldn’t really be there. It would give you more mud clearance if that’s ever a problem.
Altering chainline is literally about moving the crank further out or in to the BB – you do this by adding and subtracting spacers on the BB. It’s unlikely to be the answer here though and could lead to other issues. Swapping to a proper 1x crank will automatically alter your chainline and may help but it’s a drastic option.
If it’ll fit, a larger front ring might help – if the tension is improved and the chain is higher it may become impossible to jam it – but as already said, if it’s jamming like this while riding but not in the stand then you need to make sure there isn’t too much chain first, and if the chain is right you need to decide what you’re going to compromise on as that’ll mean that your current setup just won’t work together whatever you do.