Abdullah ibn Amr ibn Al-A'as

[Zlatan Ibrahimovic]

Was this man a sahabi?

[Farid]

Yes.

[Zlatan Ibrahimovic]

Yes.

But he was accused of fabricating lies by Mu'awiyah in Bukhari?

[Farid]

Do share.

[Zlatan Ibrahimovic]

Do share.

Narrated by Muhammad bin Jubair bin Mut’im while he was with a delegation from Quraish to Muawiyya, the latter heard the news that ‘Abdullah bin ‘Amr bin Al-‘As said that there would be a king from the tribe of Qahtan. On that Muawiyya became angry, got up and then praised Allah as He deserved, and said, “Now then, I have heard that some men amongst you narrate Ahadeeth (يَتَحَدَّثُونَ أَحَادِيثَ ) which are neither in the Holy Book, nor have been told by Allah’s Apostle. Those men are the ignorant amongst you. Beware of such hopes as make the people go astray, for I heard Allah’s Apostle saying, ‘Authority of ruling will remain with Quraish, and whoever bears hostility to them, Allah will destroy him as long as they abide by the laws of the religion.’ “

Sahih Al-Bukhari

[Farid]

There is nothing here about Mu'awiyah accusing Abdullah bin Amr of fabricating anything. Instead, he is accusing him of narrating what isn't in the Qur'an nor Sunnah.

The narration can be found in Al-Fitan by Nu'aym. You will notice that Abdullah bin Amr does not attribute this to the Prophet (peace be upon him).

It seems as though Mu'awiyah assumed that Abdullah bin Amr narrated this from Ahlul Kitab. If you return to his biography in Siyar A'alam Al-Nubala', you will find Abdullah bin Amr used to narrate from them and would read their books a lot.