What are peoples thoughts on taking a sort of backwards step in their career in order to get more experience?

I took my current job as I thought it would be a stepping stone to go on and do more development work (it was my first dev role), but I’ve been here 4.5 years and I rarely do anything other than maybe fix a bug every now and then.

They mainly have me doing non-dev support type stuff, and they don’t use any best practices or anything like that, and I feel that I am falling behind where I should be experience wise.

I am doing a degree (distance learning with the Open University) so I am working on personal development but that’s not much help when I go to interviews.

Should I think about trying to go for junior jobs, rather than just developer jobs, and the pay cuts that may go with that, or should I just grind out leet code etc and keep booking interviews?