I’ve occasionally run sound & light boards, follow spots, and PA’ed events . I definitely know SMs who “moonlight” in other theater jobs regularly, like box office, house managing, light-hangs, load-ins/strikes. If you have the talent (or just tolerance and a need for extra cash), it’s a great idea to explore those areas. For myself, I’ve found that stage management is the only thing that really suits me, so I’ve stuck with my strength, but I wish I was more multi-talented!