Yes, S25FL256L can be used as a replacement for IS25LP256D-JLLE-TR.
Please let us know if you have any queries about the features of S25FL256L.
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Yes, you can cross IS25LP256D-JLLE-TR with S25FL256LAGNFB010, maybe S25FL256LAGNFV010, which is Industrial Plus (–40°C to +105°C) grade(same as IS25LP256D-JLLE), anoother note, S25FL256L has Max clock rate 133Mhz accross operating Vcc, ISSI part are：166MHz at Vcc=2.7V to 3.6V
133MHz at Vcc=2.3V to 3.6V
104MHz at Vcc=1.65V to 1.95V