Ring Doorbelll on iOS – help answering please

Hello
I am finding it impossible to answer notifications when my Ring doorbell is triggered by an alert. The Accept and Decline options that used to be available appear no longer there, the notification disappears quickly and the Live Bbutton in the notification seems to be invisible to VoiceOver.
Using iOS 15.2 on iPhone 12. I hope there is still a way around this, either with Alexa or more importantly on the iPhone itself. I am sure I am not the only one who is using this excellent doorbell but who cannot answer the door from the phone?
Ironic too that this seems to work perfectly on android devices.
Help please I’m getting more and more frustrated with this.
With thanks.
Dennis.