The visit and the responses
Contemporary reporting records Amit Shah visiting Kibithoo in Arunachal Pradesh on April 10, 2023 for the Vibrant Villages Programme. China objected to the visit as part of its territorial claim. On April 11, India's Ministry of External Affairs rejected the objection and reiterated India's position that Arunachal Pradesh is an integral part of the country.
Source [1]What diplomatic statements establish
A ministry's statement establishes its government's position; it does not make a competing territorial claim disappear or constitute a new agreement between the countries. The point of this account is to identify the visit and the publicly expressed disagreement, with each claim attributed. It is not a current border-access or travel advisory. The linked Taiwan exercise account concerns a separate dispute, also from April 2023, and should not be merged with this event simply because China appears in both headlines. For later diplomatic developments, consult dated World reporting rather than treating an older ministerial response as a new announcement.
Source [1] Source [2]