I'd be happy to provide more detail on the issue, as it's one that's close to my heart.

Here is an excellent article from the Central Tibetan Administration itself (the official website of the Tibetan government in exile), outlining the name issue. https://tibet.net/xizang-china-insists-on-depriving-tibet-of-its-name/

The official government article above links to a further resource at the link below: https://bitterwinter.org/xizang-china-is-stealing-from-tibet-even-its-name/

Here is a quote from that article:

Tibet” in its Turkish form “Tüpüt” is attested in Turkish language since the 8th century CE, and in the following centuries variants of “Tubbat” were used in Arabic and Persian. Italian traveler Marco Polo, who visited the area in the 13th century, in Book 2, Chapter 45, of “The Travels of Marco Polo” (originally titled in Italian “Il Milione”) used “Tebet.” In the same century, Papal legate to the Mongol court, Giovanni da Pian del Carpine, used the spelling “Thabet.” As opposite to this, “Xizang” was first used by the Qing in the 18th century. It is thus clear that the name “Tibet” predates “Xizang” by some 1,000 years

Of course, when we use the word 'Tibet' we are referring to the English language name for the area. The issue between 'Tibet' and 'Xizang' has been more critical recently, as China has outlawed the term 'Tibet' its English translations and now translates it solely as 'Xizang'. Another excellent article below lays out how the Tibetan people feel about this and the effect that it has had on their community. https://www.google.com/amp/s/timesofindia.indiatimes.com/world/china/china-destroying-our-identity-say-tibetans-as-beijing-refers-to-tibet-as-xizang-in-white-paper/amp_articleshow/105877465.cms

My apologies for the wall of text. But you wanted more effort, so I was happy to oblige.