Segona Book is a cloud font. Cloud fonts automatically get installed to a non-standard location at C:\Users\YourActualUserName\AppData\local\Microsoft\FontCache\4\CloudFonts\, with each font in its own folder. There's nothing special you have to do to restore them, your copy of Office will do it for you automatically. AppData is a hidden folder.
Please note, cloud fonts will only have the correct appearance in Microsoft 365, Office 2019 and Office 2021. Earlier versions of Word will substitute a different font unless you embed the fonts in your document.