Possible to compute hmac-sha-256?

I'm trying to make an API request via Ably and it requires computing an hmac, specified here: https://ably.com/docs/api/token-request-spec#hmac

It just says HMAC value is computed with hmac-sha-256.

It doesn't look like this is supported in CF Workers?
https://developers.cloudflare.com/workers/runtime-apis/web-crypto/#supported-algorithms

Is that the case?
Ably raw REST API specification for TokenRequests.
The Web Crypto API provides a set of low-level functions for common cryptographic tasks. The Workers Runtime implements the full surface of this API,
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