WTF will folk stop buying Stans rimmed wheels and then complaining that they can’t get tyres with tubes on properly!
Tubeless them, its a piece of pi55, and what they are designed for.
To be fair though, if it won’t bead up with tubes, then it’s not likely to be easier to bead up with tubeless.
More pressure first. If that doesn’t work, then deflate, then reinflate with more pressure- sometimes it gets to the point that extra pressure is just forcing it harder into the place where it’s stuck. So it’s just like backing off a second then pushing again.