What ITC can I utilise GSTR 3B or GSTR 2A??

It is not our mistake if supplier did not upload invoices then why we should go with GSTR 2A....?

(I'm not agreed this one. but) As per GST & it's acts (note acts different & different & more different changes) ITC available through filing of GST returns by suppliers.
It's means govt not says to go with business to non filers of returns... bcoz, they not collect their revenues before GST act...😥😥😥😥😇😇😇😇🙏🙏🙏🙏😂😂😂😂

As if you have raised this query before issue of Notification 49/2019 CT DTD. 9/10/2019 o would be fully agree with you , but as the Notification prescribes that ITC available to Recepeint only if it reflects in GSTR 2A & Moreover ,one of the condition to claim ITC prescribed in section 16 of CGST Act is credit is available only when supplier deposit the Tax .