yourYour giant can easlyeasily fit into a forest. asAs you said, they are only 6 meter tall, so you won't have them picking over three any time soon. pinePine or oak are atat least twenty mettermeter tall whenwhen grown.
what imWhat I'm more interested in, is how young your world is. ifIf your giant at the time to begiants before being driven to the forest after havinghad a homeland, they must have lived decade therethere for decades before being driven off, and probably spend more decade spreadingdecades spreading said rumor. iI don't see how all those eventevents could happen in less than a century, so it would have given even more time tofor the forest to grow. andAnd when "engeenered""engineered", a forest can be grown quite quickly. what take extremlyWhat takes extremely long is the developementdevelopment of a full ecosystemeecosystem.