I believe Matrix has the same encryption as Signal. Though there are some things that leak metadata, like reactions for some reason. Would like an investigation into it as well, as I pretty frequently use it. Obviously this is assuming it’s an encrypted chat. Though would also like to see the comparison of an invite only encrypted room, vs a public joinable encrypted room.
Worth noting that the Jerboa app pushed a major update today and it’s massively improved. Definitely suggest giving it another try after today, it feels like an entirely new app.