If "seasonal_fruiting_offset" is set to 1 (in the species), fruits cannot grow and stay at age0. I think it's due to the latest version of SereneSeasons. Setting to anything else make them work again. (error for pecan and starfruit (maybe others))
Issue happens only if serene seasons is installed.

• Minecraft 1.20.1
• Forge 47.3.12
• DynamicTrees 1.3.6
• DynamicTreesPHC2 1.3.1
• PamsHarvestCraft2Trees 1.0.2
• GlitchCore 0.0.1.1
• SereneSeasons 9.1.0.0

I think that's my bad, it was just the only fruit that wasnt growing in the growth chamber.