Which version of Zowe is required for z/OS 2.5 compatibility ?
In March 2020, Broadcom released Brightside 3.0, at the same time, Zowe released first active LTS based on zowe 1.9, Zowe LTS 1.9 is included in the Brightside 3.0 installation package.
Brightside 3.0 is compatible with Z/OS 2.5, no PTF required. See Brightside Comptibility Matrix
ZOWE LTS version 1.9 and above is compatible with Z/OS 2.5.
The latst ZOWE LTS version is 1.25, see ZOS requirement for ZOWE 1.25