One option is to recreate the s2p file using data from Table 3 and instructions from the link below:
How to create .s2p file from device data in pdf?
We don't typically provide spice models for RF amplifiers, but you simulate the device's performance with s2p file in ADS. See attached zip file for the PCB board schematic and layout. You can also find gerber files under the Documentation tab on the ADL5521 product page (provided below)