You earned your SAFe certification but have no hands on experience with SAFe - Catch 22
How do you gain experience with SAFe if employers require experience with SAFe and not just the certification? What types of forums, groups, etc. do you leverage?
That seems to be the problem with gaining experience no matter the industry. I think the only thing you can do is leverage that you understand SAFe but have only practiced Scrum (or what ever you do know). That's what I'd highlight in my cover letter. I understand the roles for the Release Train in SAFe, but I've only practiced Scrum Nexus.
Never point out what you don't have experience in, point to what you do know and can bring to the table.