Hi, I'm sorry, that is not on the list either 😔. Looks like only S10 and later devices will get 12 so definitely no beta. I'm really sorry Colin, I know it's pretty unfair and I know you are really keen to be involved and try out the latest software, really feel for you. Samsung just cannot support all the slightly older devices and have to devote their efforts on the latest models. I think currently the rule is that they will provide O/S updates for three years or three major version updates, I may be wrong here but it's pretty close to this.
If you look at the details in the link below it shows you which devices will or at least should receive android 12 but this is the final release and not betas. The betas are always only run on flagship devices. It is just too much work to run and administer a beta rollout on every single device that is scheduled to receive the update.