AWS AppConfig limit

Based on AWS AppConfig service limits:

Maximum size per configuration profile:

• The default configuration size limit is 2 MB (2,048 Kilobytes)
• This can be increased up to a maximum of 4 MB (4,000 Kilobytes) per version in the AWS AppConfig hosted configuration store
• The same limits apply for deployment size - 2 MB default with a maximum approval limit of 4 MB per deployment

To reduce configuration size if needed, you can remove unnecessary configuration data or segment your data across multiple configuration profiles.

Maximum number of configuration profiles per application:

• You can create up to 100 configuration profiles per application
• This limit applies to all configuration profiles under a single AppConfig application

If you need to increase these limits, you can request a quota increase through AWS Support. For the configuration size limits, increases up to 4 MB can be approved. It's also recommended to cache configurations locally to improve performance, availability, and reduce costs.
Sources
AWS AppConfig endpoints and quotas - AWS General Reference
Understanding configuration store quotas and limitations - AWS AppConfig
CreateApplication - AWS AppConfig