In my personal opinion, I would strongly advise against travelling until you've at least received the COPR.
Here are 5 reasons as to why you shouldn't be travelling until at least 60% of the population is vaccinated:
1. You may well be fully vaccinated but others around you are not, and you can still act as a transmitting vector. Don't be selfish, don't be a potential cause for an innocent person(s)'s death.
2. You will still be subjected to mandatory quarantines set by each country; however, I'm assuming, if money and time aren't an issue for you, then this also shouldn't be an issue.
3. If you were not able to return to Canada for any reasons and your application was approved while you are abroad, your application may well be considered abandoned. It happened to some people who were stuck with CEC-inland applications abroad at the beginning of the pandemic and they were forced to reapply with a CEC-outland application.
4. After having done quite an extensive research on the topic myself, I feel nobody really knows how IRCC will handle your application. Some people managed to get their COPR just fine, while others had to reapply, but the general consensus is to stay until you at least get the COPR.
5. Lack of structure in the system of IRCC, and lack of direct, clear, and timely communication with anyone inside who's directly in charge of your application will result in many, many bureaucratic headaches down the road if you were to run into any issues. If you're built to deal with unnecessary stress and headaches, then this shouldn't be an issue.
However, nothing is impossible in life if you set your mind to it, so this is entirely up to you.