Since this is not a limited purpose FSA, you having an FSA disqualifies you and your spouse from contributing to an HSA at the same time. You would only be able to contribute to the HSA starting in January 2021 assuming you don't re-enroll in the FSA. (Or if your FSA is on a different plan year, you have to wait for the new plan year to start.) You can have an HDHP and an FSA at the same time, but you can't qualify to contribute to the HSA that often goes along with an HDHP.
Your spouse's job change might be a qualifying event that would allow you to change health coverage at your job and cancel the FSA mid-year. You would have to ask your HR department. HR would also have to advise you on the remaining balance in the FSA.
The important point is that as long as your medical expenses are eligible for reimbursement from an FSA, neither you nor your spouse can make contributions to an HSA.
