Provisioning meaning
As per my understanding on cloud native infra.
Provisioning involves creating resources like VMs/instances, setting up IAM roles and policies, Firewalls, DBs, Load balancers, any clusters like EKS, GKE, etc.
And, configuration part involves, preparing your instances to run actually your apps by installing necessary softwares and packages, setting up tables in DBs and populating data, RBAC controls on resources, etc.