Remove edges in mirror I want to modify the topology of a model, but when I was eliminating edge loops with symmetry, I realized that the edges of the opposite side were not erased along with the ones I had selected.

Is there a way to erase the geometry in both parts without resorting to cutting the mesh in half and using the mirror modifier?
I use blender 2.91 and testing 2.92.
Thanks!
Press A to select whole mesh, then F3 and search for Symmetrize; make sure to choose the correct direction.