That breaks down to either four missiles (for air-to-air missions), or alternatively – for hybrid missions – two AMRAAMs paired with two GBU-31 JDAM bombs.

Source: https://nationalinterest.org/blog/buzz/beast-mode-f-35-has-secret-weapon-207837

They are almost certainly using the glide and guidance kit - which is basically a local version of the JDAM - that turns an unguided 'dumb bomb' into a smart bomb.

Source: https://japantoday.com/category/world/6-killed-in-russian-attacks-on-ukraine-as-kyiv-continues-drone-counterstrikes

U.S. winged JDAM smart bombs operational in Ukrainenewsweek.

Source: https://biztoc.com/x/f39a137331fc15e3?ref=ff