https://unbreakableumbrella.com/unbreakable-walking-stick-umbrella-standard/
Don't know of this is the sort of thing you're looking for. It comes with a removable cap for using it as a cane. Beneath the cap is a metal spike, but it's not sharp. It's good as an umbrella and is extremely, absurdly, strong. I've heard the handle can get kind of gummy if left in the sun, but I haven't had that problem. Be forewarned that the marketing for it is a self-indulgent cesspool of mall ninja, incel, "alpha male" defensive violence fantasies. It is a good product, though.