Mushrooms can’t really be digested or broken down easily, so I’d recommend chopping into really small pieces or waiting till your litle one has molars or can chew very well. And also... learn the Heimlick manouver in case baby chokes
We did BLW and we waited a bit because they can be quite chewy and we got a bit worried. If we did, did chop up and put in an omelette or something like that. We do enoki , Little one jokes that it’s noodle and enjoys it.
thank you
Sim WEs