There seem to be a lot of hospitals in Gaza (judging by the map here
www.bbc.com/news/world-middle-east-67087035) so if Hamas has an extensive network of tunnels, it seems plausible they'd be under some hospitals. But evidence in the form of a couple of rusty guns, an old chair and a cat doesn't seem very convincing.
There also seems to be a lack of information on how many Hamas terrorists Israel is killing or taking captive, while there are constant updates on the soaring number of civilians killed in Gaza.
As this goes on I find my sympathy for Israel having suffered the attacks of 7 October waning, since the carnage and suffering of civilians in Gaza is so huge. I wouldn't be surprised if a lot of the Palestinian children who manage to survive this will be radicalised by their experience and perhaps turn out even more extreme than the adult mambers of Hamas today.