If there's nothing in Canada for you that forces you to stay, and eventually you want to move to the States, then I'd suggest you move to the States, even if it is with a nonimmigrant visa, so long as that visa allows you to continue the work in your field of expertise.
When you are getting interviewed for the visa, ensure to prove your genuine nonimmigrant intent and point out that you have filed for consular processing, hence you will return to Canada once you are called for interview.
There is a chance your visa application gets rejected, but I know people who have been able to obtain nonimmigrant visa while being in the consular processing phase of their immigrant visa application (some even post-interview, in their administrative processing, although they got lucky there!).
Once you enter the US, you will at least be able to live in the US until MTL calls you for interview.
In fact, if a long enough time has passed and you believe that you can no longer wait for MTL, you can file for AOS. Simply because you entered with a nonimmigrant visa does not mean you can never file for AOS. If that were the case, pretty much everyone in the US that obtained a greencard would be caught for fraud. The test is whether enough time has passed that would justify a change of the original intent. For example, consider the many students in the US who are on a nonimmigrant F1 visa finishing their PhD and file for AOS around their fourth or fifth year of study. Did they commit fraud? You would say no, because even though their original intent was that of a nonimmigrant, enough time has passed that makes sense for them to change their intent. But then what is enough? Four years? what about three or two or one ? Who determines the exact definition of "enough"?
The answer is the government and in this case, the USCIS . The USCIS has long had the 30-60 day guidance in place, and more recently replaced it with a 90 day. Basically if the applicant files for AOS less than 90days of declaring nonimmigrant intent, there's a presumption of immigration fraud, which the applicant must overcome (by for example providing evidence that their situation has changed). If it's more than 90 days, then the guidance leaves it to the officer whether to not do anything or to ask for more evidence from the applicant to justify their change of intent. Here is a reference on that, but a quick google can give you more info of course:
https://www.lawfirm4immigrants.com/the-90-day-rule-explained/
Again, to be absolutely clear, you will need to enter the US with an intent to return to Canada for consular processing, so your nonimmigration intent must be genuine. If a long enough time has passed that you believe warrants a change of intent, and that you have enough evidence for it, then AOS is a legitimate option to explore. But do contact lawyers, esp. those who are more familiar with cases that file AOS for family applicants that are more likely to be in a similar situation.