I checked this, successfully obtained app access token with moderation:read scope, this is response:
{"access_token":"........","expires_in":4777185,"scope":["moderation:read"],"token_type":"bearer"}
but when I try to read from https://api.twitch.tv/helix/moderation/moderators I get error:
401 - "{\"error\":\"Unauthorized\",\"status\":401,\"message\":\"Insufficient authorization in token\"}"