You're referencing backbone, not edge. It has only been a few years that MikroTik had offered a 100G solution, let alone became competitive in it. You won't find it in the backbone yet. However, many European ISP's have largely upgraded their distro and aggregation switches to MikroTik over the last five years. There's a sovereignty push, too. I would guess edge is similar, but there's too many cheap options there so probably not that much.

If your impression is based on data circa ~2020, you should re-evaluate your priors with the recent packages in mind. See https://mikrotik.com/product/crs812_ddq