Redirected URLs are not preserving query strings in Magento Commerce 2.3.4. This is a problem for older inbound links such as paid links that may be identified with query parameters (ex: ?utm_source=google), which would get lost in a redirect.
If redirected URLs are supported, it only makes sense to preserve certain query parameters as well. This is already supported in Magento Commerce Cloud within the Fastly Configuration, so it should also be supported in Magento Commerce.