Why can’t we replant Yggdrasil trees?

In the endgame we use Yggdrasil wood for soooo many different things but it’s a non-renewable resource. Why is this? Even when harvesting Yggdrasil trees for wood they drop so little of it, plus it’s non-renewable so we can’t replant any Yggdrasil saplings like we can with birch/oak trees to farm fine wood.

There is such a high demand for fine wood in the game so it makes sense for it to be renewable, but there is also a high demand for Yggdrasil wood so it should be renewable too. C’mon Iron Gate, give us Yggdrasil saplings!