You can output a list of collections in a database and filter the results by a variety of properties, including collection type. You can use this functionality to list all time series collections in a database.
Procedure
To list all time series collections in a database, use the
listCollections command with a filter for
{ type: "timeseries" }:
db.runCommand( {    listCollections: 1,    filter: { type: "timeseries" } } ) 
Output
For time series collections, the output includes:
type: 'timeseries'options: { timeseries: { ... } }
For example:
{   cursor: {     id: Long("0"),     ns: 'test.$cmd.listCollections',     firstBatch: [       {         name: 'weather',         type: 'timeseries',         options: {           timeseries: {             timeField: 'timestamp',             metaField: 'metadata',             granularity: 'hours',             bucketMaxSpanSeconds: 2592000           }         },         info: { readOnly: false }       }     ]   },   ok: 1 }