It does sound as if anyone has G Suite Legacy Free accounts will need to start paying. There is a help article which outlines this in more detail: https://support.google.com/a/answer/60217?hl=en-GB

> Can I keep my G Suite legacy free edition subscription?

> No. All G Suite legacy free edition subscriptions must upgrade to a Google Workspace subscription. We recommend you upgrade to a Google Workspace edition that meets your needs. If you choose not to upgrade by May 1, 2022, we will automatically upgrade your organization to a recommended subscription.