Very specific reimbursement question (ICHRA/HRA/HSA)

Background: My employer offers an ICHRA where leftover premium funds are available as a general HRA.

I chose an HSA eligible plan and have an HSA that I’ve maxed contributions for the past two years.

I’m “low-use” when it comes to health insurance, I get my checkup and have a few maintenance prescriptions. So I had hoped to use the HRA funds to cover the few costs I have, while still maxing out my HSA.

I was told that I have to use $1500 per year out of my HSA before I can submit for the leftover funds in the HRA.

My HSA is not administered or connected to the ICHRA at all.

Question: How would they verify that I contribute to an HSA and deny my reimbursement? Or would they even be able to?

PS: yes I understand this sounds sus. 1) I want to max my HSA as much as possible for future expenses. 2) It’s highly unlikely that I spend $1,500 on non-premium medical expenses in a given year (last year was $375). 3) if I can’t access the $1,325 in HRA funds, I’d rather spend up on a better plan.

Thanks!