I would like to use only one feature from the Business plan in my current plan. Is it possible to enable just one feature without upgrading to the Business plan?

It is currently not possible to enable only specific features from the Business plan.

To use Business-level features, you will need to upgrade the organization to the Business plan.

If you would like to test the feature first, you can request a Business trial while on your current plan to try out Business plan features before deciding to upgrade.

You can find more information in this article: Can I request a Business trial while on the Team plan?