Hi SallyAnnette16, glad to have you here on NGA!
Thanks for the call-out
@Moonhowl.
It looks like slug or snail damage to me. In the bottom picture, do you have mulch around your plant? Since these are alpine plants they grow best in rocky soil with very good drainage. Mulch will keep them too wet and will a provide an ideal environment for slugs and snails to hide in. I'd remove the mulch. But other than the damage, your plants look very healthy.
Would love to have you join us in the Semp forum!
