You very well diagnosed the problem! There is no oversea visa post where visitor visas are being processed as we know it. There is a general halt on processing, regardless of where you are applying from. I have clients who applied from Germany (all of them with good IT jobs and permanent residents of Germany, but citizens of India, Pakistan and the Philippines) and their applications are being processed in Vienna (which serves that part of Europe); clients who applied from Pakistan, India and Thailand, some of them hold 10-year US visas, some have been to Canada several times in the past and hold expired Canadian visas; clients from Nigeria, whose applications are being processed at the Nairobi, Kenya visa office, and clients applying for visitor visas from the London visa office. Some of these applications have been pending for 11 months, some for 7 months, some for 6 months. For all of these visitor visa applications, the same trend follows them. "Your application is in progress. We will send you a message when we start reviewing your eligibility" Not one has eligibility under review.
The bottom line is: except in only a very few minority of cases - elderly parents in their 70s and 80s visiting children in Canada or husband visiting spouse and children in Canada - visitor visas are not being processed because of Ukraine (CUAET) and Afghanistan. COVID caused an overwhelming backlog and visa offices received standing instructions to focus on only some priority areas - CUAET, Afghanistan, PR, Student and spousal sponsorship. Visitor visas bring them little to no economic benefit, so they can afford not to process it for now. Things might change with the lifting of all COVID restrictions. But let's wait and see.
Here is my worry: by the time they resume processing of visitor visas, there might be very high rate of refusals. These visitor visas are already being processed with the aid of IRCC's "advanced data analytics tool"/artificial intelligence/Chinook, whatever you want to call it. That robot that has been trained to be discriminatory/racist and processing applications in bulk and trying to clear the backlog, is going to recommend rejecting many of these applications, as the applicants are from visa-required countries. Those from visa exempt countries don't need visas, just eTA and they get in. Filing a judicial review for a visitor visa is not what many clients want to spend huge legal fees on, so they will let it go. However, few who are determined will challenge such refusals and the chances of success with such JRs would be high.
Just my one cent opinion!