Yes, you can turn off the Travel Expenses feature.
- Access the Travel Expenses list
- At the end of the list, you will see the question “Is this feature helpful?”, tap on No
- In the comment field, leave your opinion about the feature and tap on Submit. If you don't want to leave your opinion, you can tap on I prefer not to comment
- Then, tap on Yes, turn off Travel Expenses to confirm the deactivation
Please note that reactivating it is not currently available.