I lived in Australia with a constitutional monarchy. Yes, there are royal watchers or royal fans who follows the British Royal Family members closely. Perhaps there are more royal watchers or staunch followers in Canada, Australia and New Zealand compare to the UK (this is just speculation)
Then there are constitutional monarchists, who want The Sovereign (or Monarchy of the United Kingdom) to be Australia's head of State. These people may not necessary be interested in the Royal Family, but would much prefer the current system than an elected Head of State (i.e. Republic).
Recently, I saw a Facebook post (I have yet to find the link), where the President or Chairman of the British Monarchy Support League (something along the lines) wants the Duke of Sussex title remove from Harry and Meghan. This society has an Honorary position for a MP, who belongs to the Conservative Party.
I am still finding for the link, but I am not sure if I could find it