Is it possible to share large texts using the Sharing Component?

Is there any other way to send long texts to WhatsApp?

how large is your large text and which length causes problems?
you can try one of the WhatsApp extensions…
you can find the extensions directory here App Inventor Extensions | Pura Vida Apps
also my sharing extension is able to share something to Whatsapp…
App Inventor Extensions: Sharing | Pura Vida Apps