Issues in migrating a SaaS to AWS

There are many issues when migrating or building a SaaS CRM and SFA in AWS.

Data source integration (mainframe etc)
SFTP and use of NLB
Proper VPC networking and subnet configurations
Use of NATs
Data quality and ETL
Back end storage and scalability
File, Block, Object storage, backup, recovery, disaster recovery with IaC
IaC or use of Terraform and CFT
Monitoring, Logging, alerting
ELBs, ALBs and scalability
Management of the IaaS or configuration of the PaaS
Security updates, upgrades
OS choice and management
CI-CD pipelines, integrated testing (code, security)
Front end integration with the backend
UI, UX and ease of use
Mapping the UX to the backend schema
Encryption everywhere
Actual migration if that is what the use case is: DMS, SMS, AWS MGN and other tools