Unsuccessful Tese

My husband did a SA in 2020 and 2022 and both came back with 15,000 count, 0% motility and basically all 0’s across the board. Our doctor recommended a tese and the procedure was unsuccessful. They retrieved two sperm that were both immobile. My doctors all seem confused as they stated they have never had someone with a SA like he had and were not able to obtain sperm from a tese. He was not on any kind of medication before hand. They want to do another SA in two weeks to see if they can grab any from there to use for IVF. I started him on fertilaid and count boost and he’s taking a daily multivitamin in hopes this helps. Does anyone else have a successful experience like this? I am losing hope 😭