Is there any documentation or example project on integrating Search module in SDL DXA 2 with Elastic Search
As far as I know currently SDL community available DXA integration with SOLR and AWS Cloud search modules.
@hemkant wrote blogs about ElasticSearch Integration in Web8 and ElasticSearch Module in DXA.
Blog Reference links:
ElasticSearch Integration 4 WEB 8
I hope it helps.