You may definitely use it anywhere you like.
It is some yeowsers level hubris of every one of these folks who adopts some "source available" license because "Amazon gonna use our software for freeeeee, we go brokkkke". My company goes head-to-head with an existing Amazon closed-source offering and our stance is that if we can't out-customer-service, out-price, and generally make something more awesome than Amazon, that's on us, not because Amazon took our software and somehow ... forked it? innovated in a way we couldn't by using it?
In the meantime, during the days up until Amazon Armageddon Day(tm), you don't have any bugfixes from the software engineers in the trenches trying to use your software, the cutesy license carte-blanc rules out its use in a non-trivial number of shops that would otherwise, and it ends up generating a lot of threads during every discussion which aren't "wow, that's awesome you made transactional JMS -- I can't wait to try that out in my use case!" where you do shine
I am so sick of people pointing to the NOT OUT OF BUSINESS Elastic as the case study of "Amazon took our stuff, now we broke". AWS offers managed Kafka, also, and Confluent seems to be doing just fine. We use the Apache licensed Kafka not because we hate Confluent, but because it's infinitely easier to deploy a non-locked-in docker image than to deal with licensing keys in our deployment strategy. We similarly avoid Amazon Managed Kafka because it's pricing is stupid and the kinds of risks it drives down are not our risks
An alternative viewpoint of AWS taking your software is "wow, what a market validation! Now come get the 5 versions newer release from the experts who built it."