@sunilkumar
There is a way to bring more items into PowerApps, I had to do this for one of my application. You will need to use Collections in order to do this. The logic is simple, you need to create a series of smaller collections and then Collect them into collection to combine all the record.
//Divide your Data Source into smaller collection based on some value
ClearCollect(Collection1,Filter(DataSource,Condition));
ClearCollect(Collection2,Filter(DataSource,Condition));
ClearCollect(Collection3,Filter(DataSource,Condition));
ClearCollect(Collection4,Filter(DataSource,Condition));
ClearCollect(Collection5,Filter(DataSource,Condition));
//Note that when filtering your collections, your filters must not bring in more than 2000 records
//Combine your collections into one
ClearCollect(AllCollections,Collection1,Collection2,Collection3,Collection4,Collection5);
