Jelly, 11 bytes
Ḳs€L}Ḣ=\ƇẎ€
A dyadic link accepting the text (a list of characters) on the left and the prefix (a list of characters) on the right which yields a list of lists of characters (the resulting suffixes).
Try it online! (footer joins with spaces to avoid full-program's implicit smashing)
Note: I added three edge cases to the string in the OP - unfrackled and nofracfracheremate to the beginning, which should not output and fracfracit to the end which should output fracit.
Jonathan Allan
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