*** Moved from General Immigration-Related Discussion to the Philippines regional forum, for country-specific input ***
For adult visa applicants up to 59 years old, only the following vaccinations are required -- Td/Tdap, MMR, Varicella, Hep B, Flu (seasonal), COVID. Your fiancee must get her COVID vaccination prior to her medical appointment at SLEC Manila. All other vaccinations she can get for no extra cost at her SLEC appointment (ie, cost already included in the standard visa medical fee).
For the K2 child, same deal -- must get COVID vaccination before SLEC medical, all others will be administered at no extra cost by SLEC. Check this table for which vaccinations will be given based on the child's age -- https://www.cdc.gov/immigrantrefugeehealth/panel-physicians/vaccinations.html#tbl1