Most uses of the misnomer “transphobia” are actually incorrect, because the people involved aren’t actually suffering from an irrational medical or psychological fear of transgender people.
What they actually are doing is more accurately called “transmisia”, because they are transmisic. This means they are heavily prejudiced against transgender women and believe that they shouldn’t be involved in the competitions.
Their reason for this are not because the transgender women don’t meet the beauty standards, or aren’t passing the judging categories, but because they just don’t want them there purely due to their trans-mysogynistic preconceptions.