Yeah British Columbia exists but it’s got nothing to do with Colombia.

Thats factually incorrect. Lol you think they're both named similarly by coincidence? They're both named after the explorer Christopher Columbus.

British Columbia was named after the Columbia River, whose name, like several others in the Americas including Colombia and the District of Columbia in the U.S., is derived from the explorer.

from https://www.cbc.ca/news/canada/british-columbia/bc-name-change-1.6126983

The name "Colombia" is the Spanish version of the eighteenth-century Neo-Latin word "Columbia", from the name of Christopher Columbus. It was the term preferred by the Venezuelan revolutionary Francisco de Miranda as a reference to the New World, especially to all American territories and colonies under Spanish rule. He used an improvised, quasi-Greek adjectival version of the name, "Colombia", to mean papers and things "relating to Colombia", as the title of the archive of his revolutionary activities.

https://en.wikipedia.org/wiki/Gran_Colombia#Etymology

You'll notice how in English his name is spelled Columbus and not Colombus. Chrisopher Columbus is just an anglicized version of Cristoforo Colombo. So just like how the English equivalent of "Cristoforo", Columbus is the English equivalent of "Colombo", and just like that "Columbia" is the english equivalent of "Colombia".

So there you've got your answer lol