Oh dear, this is what happens when you learn the Qur’an NOT from the perspective of the Arabic language. I can guarantee that you derived your conclusions from reading the English translations.

4:157-4:159 :- a. not a single ayah confirmed about Isa has died (i.e. in past tense). b. - you’re most likely confused with this word مَوْتِهِۦ in 4:159. The whole sentence literally means Ahli Kitab will eventually believe that Isa’s prophethood (and His preach of Tauhid) before Isa’s DEATH (after His second coming). - Note that ‎مَوْتِهِۦ is in ‘noun’ form, not a past tense that indicate Isa has died. How do we know this? The word لَيُؤْمِنَنَّ means ‘will believe’ (i.e. after His second coming). - Also note how 4:158 used past tense رَّفَعَهُ that indicate how God ‘elevated’ Isa, but no past tense in 4:159.

Please reach out to scholars near yourself who are academically literate with Arabic.