i had 6 fruit, 0 honey, next hour, i have 126 fruit, but no honey, does fruit multiply and grows faster when there is a little left?

No. It grows back overtime on it's own.

Exactly 111 fruit regenerate every three hours on normal, according to what I've observed.

Does the honey regenerate even when the bees aren't there? Because I don't know if my villagers are harvesting it when I'm not there or something because when I'm with my tribe there is never enough honey to harvest

i think it takes a while for the bees to reproduce honey

The bees are there, but it takes them a while to make the honey.

Inside the hive? anyways, do all trees refruit at the same time?

With the honey! you get 2 about every 30 mins. Villagers harvest 8 at a time. So if you have 12 for example, they will take 8. Theen the message says "not enough food" hope that helps.