I see people sereaching fingerings and trills here almos every day, here's what my teacher gave me and it's really helpful. (feel free to copy or screenshot) : r/Flute
Figure 3 from THE VIRTUAL BOEHM FLUTE — A WEB SERVICE THAT PREDICTS MULTIPHONICS, MICROTONES AND ALTERNATIVE FINGERINGS | Semantic Scholar
3 good reasons why also YOU should use alternative fingerings with the flute - FLUTEinWIEN
Practical Alternate Fingerings for Flute by Wayne Hedrick
Alternate Fingerings for Flute Pitch in Upper Register | TPT
The Kingma System Bass Flute: A Practical Guide for Composers and Performers
Fourth Octave - Alternate Fingering Chart For Flute - The Woodwind Fingering Guide | PDF | Flute | Woodwind Instruments
Altissimo Flute Fingering Chart by Nestor Herszbaum - Flute Specialists