Chasing bugs? Yes. Being on-call? No. Not unless you signed up for that. Too many companies think they can just get Pagerduty going and sign up all their engineering staff for operations duty. This is stupid for a number of reasons least of which is managed services get rid of most of the need for this and it is typically cheaper than developer time.

Do some developers on the team need to think about scale? Yes. Should all the developers be on call because perhaps the company decided to roll it's own infrastructure and someone has to deal with occasional server with full disks? No.