Hi Francesco,
As per my understanding, you are interested to know if the system level simulation with beamforming supported with using the Communications Toolbox support package for Wireless Network Simulation in MATLAB R2023a.
There is no exact example on the beamforming in an IEEE 802.11ax OFDMA simulation using the Communications Toolbox support package, there are some resources that might be helpful.
The below example, shows the NR Cell Performance Evaluation with Beam Management in the 5G Toolbox, System Level Simulation:
The below example shows how to simulate a WLAN multinode uplink (UL) orthogonal frequency-division multiple access (OFDMA) network consisting of an IEEE 802.11ax access point (AP) and four stations (STAs) by using WLAN Toolbox and the Communications Toolbox Wireless Network Simulation Library.
Although this example does not directly include beamforming, it might provide some insights on how to incorporate it.
The below example, although not directly related to 802.11ax or OFDMA, provides a detailed walkthrough of how to configure a beamforming model for the channel.
I hope this resolves the issue you were facing.