Definitely a pain point for many companies but I think you need to have a pitch directed at PMs too. Something that tells a PM "you need good onboarding and it normally takes time to build that. Implement our solution and you'll get better onboarding and access to data you want so that you don't need to beg your developers to give it to you."

You probably don't need to convince developers that they should use this, you need to convince a PM that this is going to make their lives easier (because it makes their own life easier and their devs'.)