Thanks for the reply!
I kinda got it to work but I think the material inspector is different for me since I can't see the rendering mode or alpha cutoff option, the reason for this might be that I'm using the URP, instead of the normal pipeline. This might also be the reason that I only can see the inside textures of the trunk and the leaves kinda look weird. But I'm not quite sure because I'm just a beginner at this kind of stuff haha.