The maximum amount would be $9,300 combined, if you meet the rules for a married couple.
According to Rules for married people in the IRS' Publication 969 (2022), Health Savings Accounts and Other Tax-Favored Health Plans:
If both spouses are 55 or older and not enrolled in Medicare, each spouse’s contribution limit is increased by the additional contribution. If both spouses meet the age requirement, the total contributions under family coverage can’t be more than $9,300. Each spouse must make the additional contribution to its own HSA.
Please read the entire section of the IRS publication for complete information.
