Feature-Policy header is replaced by Permission-Policy, it has same purpose as Feature-Policy but name of header should be more descriptive of its purpose, and some syntax is changed. You can read more about it here:
https://github.com/w3c/webappsec-permissions-policy/blob/master/permissions-policy-explainer.md

You can copy/paste Permission-Policy header for disabling all permissions here:
https://lakic.one/en/securityheaders/