It can seem confusing, but the simple idea is that Platform Engineering is Product Management

It can seem like it's a lot more confusing than that. And, sure, there's plenty of things that you can put in platform engineering, but it's mostly just adding in product management to your existing DevOps/SRE/platform/ops stack. This is a "just" that leads to big, helpful changes, but you can start with platform engineering and with what you have and just add in product management to get started. Hear @thecote 's quick take.
Here's the details on what product management is: tanzu.vmware.c...
And here's the free, developer toil survey you can start with: tanzu.vmware.c...
And to dive real deep, check out this free booklet on platform engineering from @TheNewStack : tanzu.vmware.c...