Need to send multiple ad request in amp-ima-video for video ads

[as5550]

Description

i tried using 'amp-ima-video' for running a video player with google ima ad tags on amp pages, but in this ad request need to be specified in 'data-tag' attribute and that ad request will be sent only once but i want to send multiple ad requests and serve them i have already tried sending VMAP and XML ad request but only one request is sent.
Also 'loop' and 'dock' attributes are not working in 'amp-ima-video' but working in 'amp-video'.

Alternatives Considered

I tried 'amp-video' as well 'loop' and 'dock' are working but can't send multiple ad request.
I also tried the example provided ->
https://playground.amp.dev/?url=https%3A%2F%2Fpreview.amp.dev%2Fdocumentation%2Fexamples%2Fcomponents%2Famp-ima-video&_gl=1*yujfzd*_ga*YW1wLV93WUJYcGxSZk5GTlF3WjRjenlOdGc.*_ga_TYM9BH1XCX*MTcyODQ1NjAyMC4xMy4xLjE3Mjg0NTYwODcuMC4wLjA.

and in here preroll, midroll and postroll ads are served (1 each).

Additional Context

this is the code i am using you can check this as well