A few days ago, we expanded our existing system, which was working perfectly with a Fronius Symo inverter, by adding a new Fronius Verto inverter. The Victron system continues to work well with the Symo, but it only detects the Verto. Victron does not recognize or control the Verto
Did you enable the Solar API in the Fronius? The Gen24 inverters have that disabled by default, which is different than the previous models. See the 2.2.1.4 special procedure for GEN24 model section in the AC-coupled PV with Fronius document.