Meghan has largely stayed out of the public eye since the family's return, with few public appearances.
Harry has carried out several public engagements linked to his work with the Invictus Games.
Last week, he visited a school in Birmingham to launch a education programme inspired by the Games, where he played pickleball with pupils and took part in a science lesson on prosthetic design.
The games will take place in Birmingham from 10 to 17 July next year, with 550 wounded, injured and sick service personnel and veterans from 25 nations expected to compete in 12 adaptive sports.
Harry spoke to CTV after completing a skydive in Toronto to honour a promise to a 102-year-old Second World War veteran and raise awareness of military charities.
Asked what had prompted the family's return to the UK, Harry said there were "lots of reasons" but did not elaborate further.
The couple were reportedly surprised by a letter authorised by the King which reiterated that they are private citizens and set out guidance to senior government and military figures on how they should be treated.
Harry and King Charles have had a strained relationship since the Duke and Duchess of Sussex stepped down as senior working royals and moved to the US.
Meanwhile, the Sussexes' are waiting to hear whether they will receive taxpayer-funded security in the UK.
The committee which oversees royal and VIP security, Ravec, is set to reconsider the family's level of police protection now that they are full-time residents rather than visitors.

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