The identification came as Turkish, Qatari and Egyptian officials met in Cairo to discuss the second phase of the tenuous ceasefire agreement, which began in October and has held despite accusations by both sides of violations.
The next phases of the agreement include developing an international body to govern Gaza and oversee reconstruction under a two-year, renewable UN mandate.
An armed international stabilisation force is to keep security and ensure the disarming of Hamas, a key demand of Israel.
Major questions hang over nearly every part of the plan and the time frame for implementation.
In the meantime, nearly all Palestinians remain displaced and dependent on humanitarian aid, Hamas retains significant control over nearly half of Gaza and the rebuilding of the territory has barely begun.
Palestinian militants released Or's remains Tuesday.
Israel's military said Or and his wife, Yonat Or, were killed by militants who overran their community of Kibbutz Beeri on October 7, 2023.
Before they were killed by the militants, the couple evacuated two of their children from their burning house through the window, said the Hostages Families Forum.
The decision ultimately saved the children's lives - Alma and Noam were abducted by the militants and released in a hostage deal in November 2023.
The Forum remembered Or as a devoted father and talented cheesemaker who spent years working at the Be'eri dairy, eventually managing it.
The group said Or was also a chef and yoga teacher.
In total, Palestinian militants killed some 1200 people across southern Israel and abducted 251 to Gaza in their October 7, 2023, attack.
Kibbutz Beeri was one of the hardest-hit farming communities.
With the return of Or's remains, almost all of the hostages or their remains are out of Gaza.
The remains of two - one Israeli and one Thai national - are still in the territory.
Israel has agreed to release 15 Palestinian bodies for each hostage returned.
Turkey's intelligence chief Ibrahim Kalin met in Cairo on Tuesday with Qatar's Prime Minister and Foreign Minister Sheikh Mohammed bin Abdulrahman Al Thani and Egypt's intelligence chief Hasan Reshat to discuss advancing to the second phase of the Gaza ceasefire agreement, a Turkish security official said.
The talks also centred on intensifying joint efforts with the United States to strengthen the truce, according to the official who requested anonymity in line with Turkish regulations.
The three also agreed to deepen co-operation with the Civil-Military Co-ordination Centre to remove obstacles and prevent violations, ensuring the ceasefire is upheld without interruption, the official said.
Gaza's health ministry says 69,775 Palestinians have been killed and 170,863 injured in Israel's retaliatory offensive.
It does not distinguish between civilians and combatants in its figures, but has said women and children make up a majority of those killed.
