Use the Subscriber events API
It’s missing from the main docs, but it is in the Webhook docs and works as a endpoint it’s just missing from the docs
https://dev.twitch.tv/docs/api/webhooks-reference#topic-subscription-events
So call
https://api.twitch.tv/helix/subscriptions/events?broadcaster_id=BroadcasterID
And that’ll give you recent events, most recent first.
You’ll just have to filter out for what you need
The docs error is noted here