I can’t take Twitter from my Apple store

Well you asked us to guess all about your specific situation.

Some possibilities:

• Your iOS version is too old. iOS 13.4 or greater is required.
• You changed country or region.
• Your account is restricted.
• Your iPhone is managed by an employer or educational institution.
• Your payment method has issues.

sadiya97 wrote:

because when i wanted to update it..I saw that it’s already updated

It certainly sounds like you have an iPhone 6 or earlier, which cannot be updated beyond iOS 12.X. Therefore, this iPhone can never have Twitter.

You’re welcome.

Yes, the iPhone 6+, released by Apple over seven years ago, cannot be updated beyond iOS 12.X.

Enjoy your Apple gear.

What do you mean you can't take it, what happens when you try?