The Duke and Duchess of Sussex also joined World Health Organisation director-general Tedros Adhanom Ghebreyesus for a roundtable with the WHO's regional leaders, some of their humanitarian partners and key donors.
"It is an honour and a privilege to be in a room full of people with such big hearts," Harry told the group.
"I don't know how many times you get thanked for all the work that you do - probably not enough."
Since stepping aside as working royals in 2020, the couple has prioritised support for projects that assist civilians affected by war, especially injured and displaced children.
They travelled to Jordan at the WHO chief's invitation. Their nonprofit, Archewell Philanthropies, recently supported WHO efforts to evacuate children from Gaza and bring them to Jordan for treatment.
Harry and Meghan met some of those children on Wednesday, local time, at Specialty Hospital in Amman.
They also visited Za'atari Refugee Camp, home to thousands of Syrians who remain displaced after more than a decade of conflict in their home country.
The couple were scheduled on Thursday to visit the Amman office of World Central Kitchen, which organises and sends food and other humanitarian assistance to Gaza.
Harry and Meghan are longtime supporters of World Central Kitchen, their nonprofit's first philanthropic partner.
The Sussexes will also visit female leaders at the Jordanian Hashemite fund for human development, an organisation known as a pioneer in sustainable human development, and tour the King Hussein cancer centre.
With PA
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