No, you shouldn’t, it isn’t your job.
He’s on the email list. If he can’t be bothered to show up, that is his loss.
My ex hasn’t attended our ds’ school once in 7 years. He has no say in any decisions because he can’t be bothered to open the emails, therefore his views hold no weight.
You can’t change your ex but you can stop facilitating his laziness. Wait for him to ask.