As long as it has its own root system, you can separate it, but the pot has plenty of room to let it grow with the mother bulb for a while. Sometimes it's nice to have a cluster of bulbs and multiple stalks of blooms.
K

Yes, I too would leave it in the pot attached to the mother bulb . A few years from now as it grows larger it should pull away on its own with a vigorous root system of its own . In the past I have had offsets of that size become detached from the mother when repotting and they never seemed to do that well on their own; best left alone for a few years.

Donna

It is always nice to have a family living together.
Offsets grow faster attached to mother.
Arif