Here is an article showing the difficulty of obtaining TRVs in practice:
‘The decision to issue a TRV often hinges on compliance with section 179(b) of the Immigration and Refugee Protection Regulations (IRPR), which states that to obtain a visitor visa, foreign spouses must prove they will leave Canada at the end of the authorized period for their visit.’
https://www.cbc.ca/news/canada/british-columbia/couple-calls-on-new-immigration-minister-to-act-on-backlogged-spousal-sponsorship-files-issue-visitor-visas-1.6238386