Hello, you can for example test on your peer the search API (/yacy/search.html) used by YaCy peers to perform p2p searches. There are some examples in the wiki : Dev:APIsearch#Example_Usage
. Supposing your local index contains one of the sample search terms, the query sould return results encoded (hashes) results. So remote peers should be able to use them.
You can also check your solr API (/solr/select) is correctly working. There is also a sample query in the wiki : Dev:APISolrSelect
And of course your peer Status should be "Senior" but I guess you already checked that.
You should also check in (/ConfigNetwork_p.html) that "Index Distribution" is enabled. This is what controls the automated index distribution, notably through /yacy/transferRWI.html API.