Less features with iphone?

So i have orignal galaxy watch from 2020 and i used to be able to reply to messages and use the draw text feature but after switching to an iPhone this year, after some time i realised that these features were not there is this something just not available with iPhone or i can enable them?

So i have orignal galaxy watch from 2020 and i used to be able to reply to messages and use the draw text feature but after switching to an iPhone this year, after some time i realised that these features were not there is this something just not available with iPhone or i can enable them?