Some citations may not be visible on ResearchGate and Google Scholar due to several reasons, including:
Indexing Limitations: These platforms may not have indexed the journal or source where the citation appears.
Access Restrictions: Some publications are behind paywalls or have restricted access, making it harder for platforms to retrieve citation data.
Metadata Issues: Incomplete or incorrect metadata (e.g., author names, titles, or publication details) can prevent citations from being properly linked.
Delayed Updates: It may take time for new citations to be processed and reflected on these platforms.
Source Exclusions: Certain sources or publications may not meet the criteria for inclusion in their databases.
Ensuring accurate metadata and using widely indexed journals can improve citation visibility.