I tried to identify the relevant fields, but as I am not a content specialist, I could not do so.
Therefore, I have raised a Content ticket for you ref: 10010362 - using the email address linked to your forum login.
Someone, from the content team, should get back to you soon.
Can you please provide examples of RICs for which you don't see BIDSIZE and ASKSIZE? The Refinitiv Real-Time feed carries over 80million+ RICs and the fieldset can vary based on asset class, exchange, data vendor etc.
e.g. for VOD.L I can see
For other RICS it may be carried in different fields. Generally speaking for Content type queries, you can contact the Content Helpdesk via Product Support | MyRefinitiv and raise a Content query. I would recommend you attach a list of RICs or asset classes/exchanges etc when you raise the ticket - so that your query is forwarded to the right content specialist.
You may also find the Data Model Discovery tool useful.