Nice plugins, so you created two plugins, supporting ApexChart and Chart.js, and I can see on you website you also created another version of echarts plugin, I think this has been done by ECharts - Bringing amazing visualization tools to TiddlyWiki!.
But seems charts.js is much smaller, which can be a nice replacement for smaller wikis.
But what into my concern is that we might need to install multiple chart library if other plugins like Habit tracker in TW directly depend on them.
A better approach will be like Fishing, flashcard in TiddlyWiki, add new features to help remember tiddler more efficiently in release v1.2.0, it make its analysts feature be a sub-plugin, so user can choose install a version with the chat library they already installed. (Can have 2 analysts sub-plugin, depends on charts.js and echarts)