for future reference, when asking for support, you really should use the actual NAME of the option when asking about it instead of using terms that don't have anything to do with it. In this case, that is NOT a "WIDGET", its a TM (Template Modification) that inserts content into a specific location on another template. The term "WIDGET" is only used by the [bd] Widget Framework. It is the only addon that creates "widgets".
What that content in your screen shot is, is the "Forum Home Node List Module" (that is its actual NAME on the Sportsbook Options). It is designed to look like the nodes listing (it uses the same Core XenForo template syntax used for the Forum List on the default style). 3rd party styles that CHANGE the default behavior of the node blocks are changing core XF and 3rd party addons can't do anything about that, so there are cases where in order to use this, you will have to tweak the template to compensate for those changes that they made to core XF.
The name of the template is: 'nflj_sportsbook_node_list'. This template is only used for the "Forum Home Node List Module", so modifying it won't effect anything else.
NOTE: You'll notice that the name of the template (as closely as possible) relates to the content (in this case, NODE LIST).
HINT: if you filter the template list by addon name, you can usually find what you are looking for based on template name. Its a simple trick that a lot of people are not aware of and saves you time when trying to find something. Also, searching templates is another handy tool to help find the template you need.
btw, I'd not waste a TON of time on it as its going to be changed anyway. I am moving away from the Simulated Node Block in favor of a redesigned Block that will better expose Sportsbook related content to form home.