This is an issue that has been around for many years. It can be considered a fair lending or UDAAP issue. Here is a link to older but relevant ABA article on the topic: https://www.aba.com/Compliance/Documents/ce24c8f593a24f1ead883b4ce2648284SA_JointCreditReportsandFairLending2010Apr.pdf.
Check with your credit bureau – you may be able to pull credit reports for non-married joint applicants. Another option might be to pull individual credit reports for everyone. The important thing to remember is ensure everyone is treated the same, which is the point the article linked above makes.
If your bank decides to cover the cost of the credit report, you would still need to disclose the fee on the LE along with a specific lender credit to offset it.