It's very very very unlikely people will get approved for oath outside Canada. If they do allow it, it will be for certain very special circumstances as
@forw.jane stated. There has been only one anecdotal report of oath outside Canada during the pandemic as far as I remember in this forum. However, I do not have a link to that post.
If you are unable to travel for your scheduled oath, let them know and they'll most likely postpone your oath to a later date. Also, rescheduling your oath may take up to 6 months after you send proof of return to Canada... Could be sooner if you are lucky. So, it's highly recommended you not postpone or reschedule your oath if you can.