By default, lists of figures don't reference styles; they are created based on the caption label used.

Here is what you can do: At the location where the caption title ends, press Enter to insert a paragraph mark. With nonprinting marks displayed, each paragraph mark is represented by a pilcrow (¶). Then format the paragraph mark as hidden, so that the caption will appear to consist of a single paragraph (in print and with nonprinting marks hidden). When you are done, update the list of figures.

To show/hide nonprinting marks, you can click the ¶ button on the Home tab.

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Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional