royal family aren't officially allowed to voice political opinions, but the royal family has always been allowed to be friendly with political leaders.
Prince Harry, for example, has been famously good friends with former President and first lady Barack and Michelle Obama as well as former Vice President and current President-elect Joe Biden and his wife, Jill Biden, for years now.
Harry first became friends with the Bidens in 2013 during a visit to the United States. The next year, Jill Biden attended the first-ever Invictus Games in London and then she brought Joe along to support the event in 2016 and 2017, the Daily Mail explains of the history of Harry and the Bidens' bond.
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