I developed the Ally Invest plugin and implemented options combo orders.
The source code is here:
https://github.com/AndrewAMD/AllyInvestZorroPluginI added the feature because I wanted the feature.
Whereas, there are various closed-source plugins by oP group. Simply ask nicely for the new features you want, and they may or may not decide to implement it.
There's nothing to stop you from, say, developing your own version of any plugin. But it may or may not be worth your time.
