If the bowl you are heating is smaller than the radius of the microwave’s glass-platter, then no problem, you can offset it to touch the outside of the platter and miss the centrepoint.

If the bowl is larger than the radius, I usually heat for half the time with one side of the bowl touching the outside of the platter, then slide the bowl to touch the opposite side of the platter, and then heat for the other half the cook time.

Even heat dispersion generally.