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
The 19th century simple system flute, II
Alternate Fingerings for Flute Pitch in Upper Register | TPT
Altissimo Flute Trill Chart Card > Carolyn Nussbaum Music Company
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Fourth Octave - Alternate Fingering Chart For Flute - The Woodwind Fingering Guide | PDF | Flute | Woodwind Instruments
Amazon.com: A Modern Guide to Fingerings for the Flute: 9780882844497: Pellerite, James: Books