[pay] {one's} last respects

to show honor, reverence, or farewell to a deceased person, typically by attending their funeral, memorial service, or viewing the body before burial or cremation

The entire community came together to pay their last respects to the firefighter who had served with distinction.
At the funeral, attendees had the opportunity to pay their last respects and say their final goodbyes.
Yesterday, I paid my last respects to a dear friend at the memorial service.
They are currently paying their last respects at the open casket.
He traveled from across the country to pay his last respects to his late mentor.