https://www.uncommongoods.com/gifts

From uncommongoods I would specifically recommend cheese board, murder mystery jiggsaw puzzle, or Scratch Map Deluxe.

https://www.huntakiller.com/

Hunt A Killer | Murder Mystery Games & Subscription Boxes

Immersive Murder Mystery Games where you are the detective. Told through realistic clues, intricate puzzles and complex ciphers. . Can you unravel each web of lies and clues to solve the mystery?

Greedy Cup

Magnet Globe

https://shop-us.kurzgesagt.org/collections/calendar

I can probably find you more swag if you can give me their preferences.

ptware.com for chem nerds

This might sound very weird, but here is my suggestion.
How about some stocks, especially ones with high dividends?

It doesn't seem huge at first, but when they receive dividends, they will be happy with unexpected income, and it will remind them you have bought the stock for them.

This website can be very useful for this idea:
https://www.finder.com/uk/buying-shares-as-a-gift

Knife hone/whetstone. Kombucha brewing starter kit. Sprouting kit. Perfume testers (free: just pick some up in store). High quality umbrella (e.g. Blunt).

Cookbooks! You can tailor them to the individual, like a culture-specific cookbook for someone who loves traveling, or a quick-and-easy cookbook for a college student, or the Snoop Dogg cookbook (actually had some great recipes!).

A nice multi tool for a family member who wouldn't buy one is usually appreciated. Very handy

What's your budget and what is their budget?