My dh and I share most accounts, he doesn't look at anything though. I take money from his account and put it into our savings and there's 25k in there. He knows there's savings but i think he thinks there nearer half of what is actually there. By his own account he's better off not knowing how much is there. Of course it's joint savings and if he wants access he just need log on
I also have an envelope of cash, I was due a weekend away with a friend in 2020 that got cancelled so I put the £400 into an envelope and I've occasionally added to it, I counted it the other day and there's £800, I was really surprised how the odd fiver has added up