So as promised, my answer to your question if Trump sexually abused multiple women, is, technically no. As he's been found liable for sexual abuse of only one woman, E Jean Carrol, not multiple women.
But regarding that "one". I'll put it in your same words, IF it's true. Then I accept it. The jury believed her side of it in spite of her very dodgy testimony and no proof, just her testimony. And if it did indeed happen, then I condemn Trump for it, 100%. But I reserve some skepticism based on her not even remembering what year this allegedly happened and other dubious parts of her testimony. But it's true, the jury found him liable. Can't deny that one bit.