There aren’t necessarily financial products they can use to make up for their lack of planning.
First you give them a clear picture of what their retirement income will look like:
“You’ll get $X from social security, you’ll get another $200/month from that annuity you bought, and then you can afford to withdraw another $100/month from savings. Can you live off that?”
Then see what family resources they have, like a sibling or child they can live with. Really it ends up being more like a church welfare conversation and there’s no money in helping these people, so most financial planners won’t waste their time doing it.