I had to look up where it’s been moved to.
I’ve only ever stayed in Sukhumvit so no idea around for hotels near embassy.
I like to walk about in Bangkok so enjoy the walk.
Last time I was in Bangkok I stayed on Sukhumvit soi 18 and the wife and her mum walked with me all the way to Pratunum Market. They weren’t impressed.
No idea if you’re partner has a passport yet but can pay extra for same day passport if not.
All the best with your stuff.