TikTok wrote to Taoiseach Leo Varadkar to express its disappointment days after the issuing of advice restricting the use of the video-sharing app on official devices.
The company also contacted the head of the National Cyber Security Centre (NCSC) requesting a meeting on the matter.
In April, the NCSC issued advice to the Government that TikTok should not be installed or used on official public sector devices, save in exceptional cases where there is a business need.
It followed similar moves by the US and UK governments, as well as EU institutions, which banned the Chinese-owned platform on staff devices over cybersecurity fears.
Documents released to RTÉ News under Freedom of Information show that on 21 April, hours after details of the Irish restrictions were confirmed, TikTok emailed Dr Richard Browne, Director of the NCSC.
"We understand that the NCSC is to issue guidance related to TikTok after an 'assessment' of which we were not a party to," wrote TikTok's Head of Public Policy and Government Relations for Ireland.
"Can you please send us a copy of this assessment and we would ask you to meet as soon as possible as a matter of fair procedure," the email stated.
The NCSC arranged a meeting with TikTok for the following month.
Six days after the restrictions were announced, TikTok's Vice President of Public Policy for Europe Theo Bertram wrote to Mr Varadkar.
"We were disappointed to discover that the National Cyber Security Centre has provided guidance to the Irish Government pertaining to the use of TikTok on public sector devices," Mr Bertram wrote.
"However, we are encouraged that you say there is the opportunity for this guidance to be reversed subject to the obtaining of further information and assurances from TikTok," he wrote.
In the letter, TikTok said it would welcome a discussion on how to reverse the guidance and said it regretted that it had not been consulted when the NCSC was carrying out its assessment.
TikTok's letter outlined details of its ownership structure and highlighted various steps it is taking to reassure regulators when it comes to data security.
"This includes establishing a Transparency and Accountability Centre in Dublin which you are invited to visit," the letter to the Taoiseach stated.
It also detailed the use of data centres in Ireland for the storage of EU user data.
"Our newly established data centre in Ireland has completed a series of testing as we now move to the next of phase of migrating European data to our Irish data centre," TikTok said in its letter.
"This migration will continue into 2024," it added.
