If you mean whether you can retrieve all admonitions of a certain type, it is not dissimilar to the answer you got from @baijw to your question Is it possible to filter blocks based on colors? - Questions & Help - Logseq:
- for quotes:
{{query "#+BEGIN_QUOTE"}} - for warnings:
{{query "#+BEGIN_WARNING"}} - …
To search within, you need a more complex query with operands:
{{query (and "#+BEGIN_QUOTE" "Gandhi")}}