That doesn’t look big enough for a teil, even if the bird is just in there for the night it is not preferable.
The best cages for cockatiels are flight cages, you could find them on second hand websites such as Facebook marketplace if you want them for cheaper.
Cockatiels have an average wingspan of 19.5"/50cm. In order for them to be able to stretch comfortably, their cage should be a minimum of 32x21", or around 80x54cm. You also need to check the bar spacing - too wide and the bird may escape, or, worse, poke their head through, get stuck and get injured or even die as they struggle to free themselves.