Adding Mycorrhizae during flower pointless?

Would adding additional Mycorrhizae be beneficial at all in the last 3-4 weeks of flower? I’m using soiless HP PRO-MIX (which is pre-inoculated). Would it boost any of the Mycorrhizae that may have been depleted over the past 8 weeks?
My plants are already doing well, just curious to see if there’s anything I can do to make them even happier.

Yes, pointless, save it for next time. If your plants look happy, just hang in there and wait to harvest until they are fully ripe, that's the best thing you can do to improve your harvest. Don't be afraid of amber-here is a good guide with other signs of ripeness to look for besides just trichome colo and %: https://forum.grasscity.com/threads/a-guide-on-when-to-harvest.666373/
Good luck to you!