Can you share the curl you are using ? Hopefully, you have set the content-type to multipart/form-data in headers and included the file path as part of the multipart form data.  

You can validate it by adding zero to the respective offer attribute.  Example - offer.characteristics.get("<offer_attribute>") + 0

Audience evaluation is based on the data in UPS. Kindly check if you have created the audience as of type streaming.  Reference - https://experienceleague.adobe.com/en/docs/experience-platform/segmentation/methods/overview 

Frequency capping, suppression lists, and journeys are sandbox-scopedProfiles and experience events are NOT shared across production sandboxes As such, there has to be a middleware built in which will centrally track message sends across all sandboxes and enforce cross-BU frequency decisions before...

Kindly take a look at the following link  https://experienceleaguecommunities.adobe.com/t5/real-time-customer-data-platform/what-is-inlet-id-and-where-we-can-find-in-aep-when-do-we-use-it/m-p/691681 

can you delete the end activity in the below transition and try again

@MarzenaRa  Try giving a label to the respective activities and you should be able to see both of them (under merging options)  

It shouldn't automatically update. Kindly check if there was any process which updated the consent to 'n'

@DibyasaiJe Id specific consent of the test profile (used for proofing) is set to 'n' and hence the proofs are being excluded.   Kindly use a different test profile for validation.

It will be there in ajo_email_tracking_experience_event_dataset with _experience.customerJourneyManagement.messageProfile.channel._type='https://ns.adobe.com/xdm/channel-types/sms' filter