There are so many herbal products in market e.g., Cough syrup, Constipation herbal medicines or others, which claim to contain several herbal extract (Botanical ingredients). Each Botanical extract is comprised of thousands of macro and micro molecules of different classes/groups of molecules in different concentrations?
Regulatory agencies expects quality control and claims of these ingredients parallel to synthetic drugs, which are based on absolute molecule (Enriched to 99% plus) and not possible in Herbal medicines.
Moreover, degradation during Shelf life studies made mandatory have also been asked for? How come it is possible and how one can support Herbal medicines or Regulatory agencies not to consider herbal medicines parallel to synthetic drugs as Herbal medicines are based on Holistic Science.
I had a quick look and was surprised in the lack of information. In the UK, this recently updated document is all I found and it does not include the all important detail that you listed and that - I would think - should be necessary information:
https://www.gov.uk/government/publications/herbal-medicines-granted-a-traditional-herbal-registration-thr/herbal-medicines-granted-a-traditional-herbal-registration
But I would expect that the info here may allow inquiry into individual products if necessary. But I would think that this information should be available on every preparation. This is our NHS advice:
https://www.nhs.uk/conditions/herbal-medicines/
I found this older WHO organisation link but couldn't find the listing I had hoped for:
https://apps.who.int/medicinedocs/en/d/Jh2945e/11.html
Likewise this worldwide review:
https://apps.who.int/medicinedocs/pdf/whozip57e/whozip57e.pdf
I found this interesting but it did not answer your question:
https://www.ema.europa.eu/en/documents/scientific-guideline/guideline-specifications-test-procedures-acceptance-criteria-herbal-substances-herbal-preparations/traditional-herbal-medicinal-products_en.pdf
This is a book that can be searched for information online:
Mukherjee, P. K. (Ed.). (2015). Evidence-based validation of herbal medicine. Elsevier.
https://books.google.co.uk/books?id=DOKcBAAAQBAJ&pg=PA66&lpg=PA66&dq=formal+listing+of+herbal+preparations,+contents+etc&source=bl&ots=NIksEwSRde&sig=ACfU3U1v1DWJQva8unNMWS-cXblthNa-Jw&hl=en&sa=X&ved=2ahUKEwjLxa6Y1drmAhX_URUIHdDlC6oQ6AEwEXoECAoQAQ#v=onepage&q=formal%20listing%20of%20herbal%20preparations%2C%20contents%20etc&f=false
It can be estimated by Cinematographic techniques such as HPLC, HPTLC etc.
Marker based standardization by any chromatographic technique has its limitations..
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