Only content from the SRD is available at this time. Hex isn't a spell that was provided in the SRD. I suspect full spell lists will become available in phase 2 and likely be a subscription feature.
It looks like WotC has limited the public beta to include only the SRD content released under the OGL. I don't think that Hex is included in that content and is therefore not available here for now.
I quickly went over my current character spells, and discovered that Hex (level 1 Warlock spell) is missing.
May be the case for other spells too, does the data was all entered or it is still in progress?
EDIT Answered: Only SRD
There are all the spell appearing on the System Reference Document (SRD). This is true for magical items and monsters as well.
Only content from the SRD is available at this time. Hex isn't a spell that was provided in the SRD. I suspect full spell lists will become available in phase 2 and likely be a subscription feature.
It looks like WotC has limited the public beta to include only the SRD content released under the OGL. I don't think that Hex is included in that content and is therefore not available here for now.
Searching for "Tasha" is also at disadvantage :-)
Spells from all official sources shall be included - anbd in this case the filters require "source" to exclude sources from the list if required.
good to know, I had begun compiling a bug list of all the spells missing, so this saves me quite a bit of time.