Mostly, yes.

https://icannwiki.org/.google https://icannwiki.org/.microsoft https://icannwiki.org/.apple https://icannwiki.org/.fox https://icannwiki.org/.walmart https://icannwiki.org/.honda

All of these are examples of Brand TLDs (https://icannwiki.org/Brand_TLD), which can be registered as part of ICANNs New TLD program which started in 2012.

As many 'new' TLDs (such as the ones introduced in the 2000s such as .travel, .museum and .mobi), many of them are not used a lot, and many people are not familiar with them.