How to support a sanseveiria?

Question

It’s indoors and quite large and needs some support.

Answer 1

Your plant may need dividing.
It also could be other issues, such as inadequate light.
You can try staking the plant, but it would be a temporary solution.

These links will help you.

https://www.gardeningknowhow.com/houseplants/snake-plant/snake-plant-propagation.htm
https://www.gardeningknowhow.com/houseplants/snake-plant/snake-plant-care.htm
https://www.gardeningknowhow.com/houseplants/snake-plant/droopy-snake-plant-leaves.htm