Most people don’t travel to the US, especially by plane, and then a month later decide to claim asylum in Canada. The one exception is if there is a major country condition change during their visit like a war. Assume you did gathered documentation in support of your asylum claim, profession, identity documents and maybe even a few keepsakes which a normal tracker would not bring with them on vacation. The issue of using the US entry, especially by air, to claim asylum in Canada was somewhat overlooked but still became more of an issue at the end of the Biden term. It is impossible to predict what will happen when you become a Canadian citizen or even a PR. As a citizen it should be easier but not sure you can count on logic these days. It really depends on the administration at the time and their enforcement intentions/goals/views and likely attitude towards immigration in the US. In general it is going to be more difficult for everyone to enter the US in the near future and entry (or entry without detention) is never guaranteed for anyone expect US citizens.
