There is not yet a ready-made library component for SVPWM on the RT Box that covers the range of customer use-cases.
However, it is possible to create one's own SVPWM for the RT Box. One example for a 3L-SVPWM modulator is shown in the ''SVPWM Control of a Grid-Connected Three-Level NPC Inverter" demo model included with the RT Box Target Support Package. Another simple SVPWM approach would be to use common mode injection as shown in the "Three-Phase T-Type Inverter" model in the regular PLECS demo model library (dcm = (max(da,db,dc)+min(da,db,dc))/2).
As suggested in the previous ticket, if you have a more specific need for your application you can contact email@example.com directly so we can see if we have a solution.