Solutions for 3rd party patching in an air-gapped network?

I support multiple air-gapped networks and right now all we use is windows via WSUS or running a powershell script that pushes the KBs to each computer. We have a powershell script that updates a few 3rd party’s applications as well like Firefox,edge, office 2021, adobe pro but would like a better long term solution. My team is looking for a better solution to cover more 3rd party products. The last company I worked for used a mixture of WSUSOffline and PDQDeploy to push out 3rd party patches for our airgapped networks.