Well actually they did do a lot of travelling (I know how important accuracy is to the posters on these threads)
July 2018 IrelandThe Duke and Duchess of Sussex visited Dublin, Ireland, at the request of the British government. This was the first official overseas tour of the Duke and Duchess of Sussex after their wedding in May 2018.
15–31 October 2018 Australia
Fiji
Tonga
New ZealandIn June 2018, Kensington Palace announced that the Duke and Duchess of Sussex would tour Australia, Fiji, Tonga and New Zealand around the time of the Invictus Games, which was held in Sydney in October 2018.[54][55]
26–27 November 2018 ZambiaThe Duke of Sussex took part in a commemoration service for Zambian military veterans and attended an event of The Queen's Commonwealth Trust.[56]
14 February 2019 NorwayThe Duke of Sussex visited British servicemen and women in Bardufoss.[57][58]
23–25 February 2019 MoroccoThe Duke and Duchess of Sussex visited Casablanca, the Atlas Mountains and Rabat. They visited projects centered on the issues of "women's empowerment, girls' education, inclusivity and encouragement of social entrepreneurship".[59]
9 May 2019 NetherlandsThe Duke of Sussex visited The Hague and attended events to mark the official launch of the 2020 Invictus Games.[60]
24 May 2019 ItalyThe Duke of Sussex visited Rome to take part in a fundraising polo match for his charity Sentebale.[61]
3 September 2019 NetherlandsThe Duke of Sussex travelled to Amsterdam to launch Travalyst, an initiative "to encourage sustainable practices in the travel industry".[62]
23 September–2 October 2019 South Africa
Malawi
Angola
BotswanaThe Duke of Sussex visited the Southern African countries at the request of the Foreign and Commonwealth Office. He was accompanied by the Duchess of Sussex and their son Archie in South Africa and later made solo appearances in Malawi and Angola. The trip also included a short working visit to Botswana by the Duke. As President of African Parks and Patron of Rhino Conservation Botswana, the Duke of Sussex raised awareness about wildlife issues and visited the MOD-African Parks. In his capacity as President of the Queen's Commonwealth Trust, he carried out engagements related to socio-economic and environmental challenges.[63] The tour included a walk by Harry in a former minefield in Angola where his mother Diana, Princess of Wales, had walked and raised awareness about before her death.[64] This was followed by a visit to a British military unit in Malawi. The Duke also attended the renaming ceremony of an orthopaedic centre in Huambo, Angola, which was renamed the Princess Diana Orthopaedic Centre in his mother's honour.[65]
2 November 2019 JapanThe Duke of Sussex attended the 2019 Rugby World Cup Final in Yokohama.
And of course they did have a baby.
Interestingly in 2013 the year Prince George was born the Cambridges made no foreign trips.