In what way was Jesus' prayer heard (Hebrews 5:7)?

"Prayers and petitions" refers back to all his prayers and petitions, including the one at Gethsemane.

The question implies that his prayer to not die was not heard. The implication is only half true.

It was prophesied that His prayer would not be heard in the law of the leper. The leper is a prophesy of Christ bearing our sin (leprosy).

He shaves his head as a prophecy that Christ would lose his 'covering' when the father forsook him on the cross.

He covers his upper lip, and act done when a prayer is not heard, to prophesy that Jesus's prayer was not heard. He would die.

When the leper is covered fully with leprosy he is declared clean, just as Christ shed our burden of sin in resurrection.

Then he goes through a ceremony like a priest, to prophesy that Jesus became our high priest in resurrection.

But his prayer was also heard. This contradiction is not a contradiction but a riddle. If he prayed that he not die physically, how much more has the Father heard him, when death itself is conquered. Jesus understood that though his will was to not die physically, the Father had answered a much greater request.

Though he died, he is not dead.