Not so sure about this. I attended a Missouri Synod church in Myrtle Beach, SC and had a visiting female pastor preside over service at one point.
She wasn't ordained in the LCMS, they don't have female clergy. She could be a deaconess but as far as 'presiding' during the service I'd have to know the context.
Is this possible?
However, there are some wacky liberal congregations on our left fringe that do things they're not supposed to do, so I can't say it's not "possible."
But I'd also have to know more details to make a judgment--i.e., what is meant by "preside at one point."
Women can’t be ordained pastors in the LCMS. Might be an LCMC (splinter from the ELCA), but not LCMS.
That is one of the “trip wires” for me and a great many MoLu’s.