@Just-Lisa-Now-  The IRS says this.

Q13. How should registered domestic partners report wages, other income items, and deductions on their federal income tax returns?

A13. Registered domestic partners should report wages, other income items, and deductions according to the instructions to Form 1040, U.S. Individual Income Tax Return, and related schedules, and Form 8958, Allocation of Tax Amounts Between Certain Individuals in Community Property States. Form 8958 is used to determine the allocation of tax amounts between registered domestic partners. Each partner must complete and attach Form 8958 to his or her Form 1040.

I also live in a community property state and until around 2018 - 2019 WI had  Registered domestic partners. it was discontinued, but even when we had it I did same as you do. Just filed federal as single with each persons income, and  deductions. Never had any feed back even though it wasn't 100% correct.