Hi @jimS10 @Knightshift76 The S10 was eligible for the Beta programme last year, evidence here https://www.sammobile.com/news/galaxy-s10-android-11-one-ui-3-0-beta-program-is-now-live/ However remains to be seen if it will be included this time, in any case obviously more modern devices will be first in line. According to a Moderator there was a Beta for the Z fold 3 in the Uk but a limited time to register, see more here https://eu.community.samsung.com/t5/galaxy-z-fold-z-flip/fold-3-beta-12-android/m-p/4340374#M4168 Betas are only ever available in select matrkets.
on current schedule the Z fold 3 is due to receive the official One Ui 4.0 Android 12 in December and the S10 in January.
Realise some customers can be eager to experience and test new software but Betas are limited by nature and not all Beta participants are happy with the experience, personally I was pretty satisfied but always some bugs.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 4.0,Android 12 Official Version.