Any chance the wheels themselves are mis-aligned? I.e. are the 3 and 9 o'clock positions of the wheels possibly out of whack? (imagine grabbing the wheel at 3 and 9, pushing with one hand and pulling with the other) Adjusting the lower wheel is possible via the goofy 4 screws & locking nuts mounted to the backsides of most saws - the screws that support the axle shaft of the lower wheel. Many times the upper wheel is loose in this axis so that the bottom wheel controls the blade alignment.
If the wheels are way out of whack, I'd expect the blade guide bearings or guide blocks (whatever your saw uses) would be slightly angled relative to the blade, just like the miter slot. If they line up with the blade nicely, then don't mess with the wheels - concentrate on the table.
The 4 bolts that hold the trunnion to the work table on my saw pass through slightly oversize holes in the table to allow the type of alignment you asked about. Not a whole lot of adjustment range but there is some range.
mpc
If the wheels are way out of whack, I'd expect the blade guide bearings or guide blocks (whatever your saw uses) would be slightly angled relative to the blade, just like the miter slot. If they line up with the blade nicely, then don't mess with the wheels - concentrate on the table.
The 4 bolts that hold the trunnion to the work table on my saw pass through slightly oversize holes in the table to allow the type of alignment you asked about. Not a whole lot of adjustment range but there is some range.
mpc

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