Decay functions score is missing on version 8

[icyice80]

Elastic.Clients.Elasticsearch version:
8.11.1

Elasticsearch version:
8.11.0

.NET runtime version:
7.0.9

Operating system version:
Windows 11

Trying to upgrade the client lib from using elasticsearch.net 7 to 8, cant find Decay Function score in version 8, is this feature missing? if that's the case any ETA on when it will be available.

Thanks

[icyice80]

closing it as it's duplicate request as the one below:
Support missing DecayFunctions in FunctionScore