Yes, it is possible to display a feed from each of the social media plugins within the same widget.
To do this just apply the shortcode for each feed directly following one another in the order desired for display within the same text widget as follows:
[custom-facebook-feed]
[instagram-feed]
[custom-twitter-feeds hashtag=”#awesome”]
However, having all three social plugins appear within a single feed would not be possible.
Also, the feature or ability to use or filter content within a feed by hashtag requires the Pro version of the plugin for both the Custom Facebook Feed and Instagram Feed but not for the Custom Twitter Feeds plugin. (Shown above).