Can I use my Thai partner’s income for financial requirements for a Non-O visa extension?

You are unable to use your thai spouse income to meet the financial requirements for foreigner married to thai national in a same sex marriage. That only works for foreign females married to thai males because they do not have the 400K baht requirement

You would have to bank 400K baht in a thai bank account in your name only for 2 months before you'd apply for the year marriage extension at the immigration office where you live.

You should be able to get the one time 60 day visit thai family extension and that would buy you time to get the 400K baht seasoned the required 2 months before you apply for the year extension