As as been said on many threads on here it is not necessarily what has been published by IRCC that will determine whether immediate family members of citizens or PRs can travel it will be whether the airline checkin is convinced of the relationship to allow boarding,
Add to that of course whether in the near future any airlines are left flying into Canada for an extended time period given they will not want to fly nearly empty or expose their crews unecessarily, or simply Canada like some other countries simply bans International passenger flights for a while. Then of course you have the scenario that if not a direct flight you have transit country restrictions where a traveller could be stuck in transit.
We all on here can give some hope / interpretation of what has been published as far as travel but ultimately this situation is bigger than this forum and nobody can predict anything even hour by hour. Personally if was me and accept is difficult I would stay put in home country until it is safe to travel but thats just me