Serverless deploy in an airtight AWS VPC

Hello I’m trying to perform a serverless deploy from a Jenkins pipeline running in an airtight (completely no internet access, no internet gateway no Nat Gateway). I have setup VPC endpoints for S3 and CloudFormation, but in the region I’m in there’s no VPC endpoint for AWS STS, as so serverless is failing because it needs to make a call to STS. Is there a way to get around this issue? is there a way to supplement serverless with what it needs from STS via a config parameter?