https://www.researchgate.net/publication/349850528_The_Combination_of_Bromelain_and_Acetylcysteine_BromAc_Synergistically_Inactivates_SARS-CoV-2/fulltext/607092a04585150fe997f55b/The-Combination-of-Bromelain-and-Acetylcysteine-BromAc-Synergistically-Inact
The combo might chew up the spike protein. the Japanese say nattokinase chews up the spike protein.
Do not know if this is what you are looking for or not.
Many thanks!
-SB