Once u get passport request For PR in India, we need to submit the passport and the applicant needs to be in India to do that.
No, applicants (even outland applicants) can be 'landed' virtually in Canada, without requiring travel back to home country.* The process is to inform IRCC of change of address to Canada when the principal applicant arrives in Canada.
*IRCC can require personal interview in home country. Interviews are fairly rare, however, and since covid, more frequently done by zoom. I do not know if in-person ones are happening more now, not that many interviews by which to judge. (If others have more info, of course...)
its just twice the travel. So if I'm expecting Passport request soon for PR. Its rather best to wait 1 more month to get the PR done before travelling to Canada. Its just we cant predict IRCC on how long they l take to do the background check - it can be completed in 3 days or 3 months
Apart from it not being true that one has to travel twice (see above): it's up to you.
I don't have all the details on your application - from your post history it looks like you applied in April? Just from pure averages - my impression from following spousal apps, but not all that closely - that puts you at 3-5 months. Getting apps completed in less than six months is
fast, and mostly happens only in very straightforward cases from countries with very good criminal security cooperation (USA/Five Eyes/NATO/EU - very roughly, and my imperfect description). In other words, not India.
By pure somewhat-informed speculation: that likely means 2-10 months remaining, and two would be on the short end. You decide.