On CloudAMQP there are logs which are telling that AMQP 1.0 is not supported and that it requires enabling the rabbitmq_amqp1_0 plugin
=ERROR EVENT==== Wed, 07 Jun 2023 10:37:59 GMT === 2023-06-07 10:37:59.477653+00:00 [error] <0.8920.2> closing AMQP connection <0.8920.2> (xxx.xxx.xxx.xxx:38068 -> xxx.xxx.xxx.xxx:5671):, amqp1_0_plugin_not_enabled
Not sure which service is using AMQP 1.0 as the majority uses 0.9.1 as there is multiple consumers
The question here is would be both protocols v1.0 and v0.9.1 be supported if rabbitmq_amqp1_0 plugin is enabled.