What you're saying makes me think it's a good idea then. Delivery Lead is the role I'm 'training' in at the moment. No one has told me to do a course. I wouldn't even call it 'doing a course'. As said above, I'm watching my way through a video explaining it all. If that is enough to then get a certificate to show I know about it, it seems like a good idea is all.
I'm reasonably sure Delivery Lead/Scrum Master isn't a senior role, it's just a role in the team. Technically I just need to know how Scrum works and make sure everyone is following it well, but I also need to be able to remove blockages and communicate across teams. I should also point out, it's not expected I need to have everything from day one. As a 'Partner at risk' they just need to believe I will be capable within 3 to 6 months. Again, learning and getting certificates, to me, would help show I am keen and will be able to grow into the role.
One thing a DL advert just placed does ask for is knowledge in ITIL. Is that common? It's not something I've seen before.