i was recently on the datapack version of wwoo (https://modrinth.com/datapack/william-wythers-overhauled-overworld-(datapack) and chopping the 3 wide dark oak trees it adds also chops many of the treetops of other trees surrounding it

It sounds like an issue with the datapack. Leaves blocks have a hidden "distance" value that says how far they are from their parent tree, it's used to decide when leaves should decay. That's what TreeChop uses to decide which tree each leaves block belongs to. If those values aren't set correctly, this kind of issue happens.

You can check by pressing F3 and looking at leaves blocks. Look for a "distance" value on the right, it should vary between 1 and 7. Like so:

If the distance values are all the same, you could report this to the WWOO devs.

Also, the config file treechop-common.toml has a maxBreakLeavesDistance setting, you can lower that if you want but it's gonna cause some trees to leave behind floating leaves.