The following is translated from a La Presse news paper article from 5 sept. 2023.  They are saying they are already using some of it mixed with kerosene.  I think it is a promissing start.

The decarbonization objectives of the aerospace industry involve a considerable reduction in the use of fossil

fuels. Far from being a utopia, the use of sustainable alternative fuels is already a reality. Overview with 
Jean Paquin, president of SAF+Consortium, and Hany Moustapha, professor at the École de Technologie 
Supérieure (ETS)...

...Currently, regulations do not allow more than 50% SAF to be mixed with kerosene. In fact, we only use a 
few percent of SAF. But we are working on reactor projects powered 100% by eSAF.
complete article here

Link to SAF+ Consortium website