Just FYI if you have any existing dashboards tied to Influx v1, you will need to create a DBRP mapping and point your existing datasource in Grafana to it so they keep working. The new v2.x Flux language is totally different for the queries in the dashboards.
Here is a little bit of info on it, Influxdb2 and HE integration - #9 by jtp10181 . At a minimum you only need the v1 DBRP and not the v1 Auth, since Grafana supports using a token to authenticate for InfluxQL by adding a manual authorization header. Here is the guide from Influx, giving you a link right to the key piece which is the token authentication: Use Grafana with InfluxDB OSS | InfluxDB OSS 2.7 Documentation
May be best if you have any questions to post over on the Guides post and we can chime in there.
