Why are certain tokens not swappable?

Ondo US dollar yield with the arbitrum token address 0x35e050d3c0ec2d29d269a8ecea763a183bdf9a9d cannot be used for swapping even though its part of a abalancer pool.
What could be the reason?

GM

Ideally, you make a PR to the tokenlist. Then the token is whitelisted for trading. Note that in certain instances we might block trading because of smart contract risk :GitHub - balancer/tokenlists

Also if it is a yield bearing asset, the token needs to go through review in our rate provider repository: GitHub - balancer/code-review

Feel free to open a ticket in our Discord to get further assistance.

Cheers