Well like any political descriptor, "far right" is a generalization that applies to several groups. In this case, Elon is part of the corporate-techno-authoritarian far right that supported trump, while figures like Loomer who were posting the anti-H1B content are part of the white-nationalist/christian-nationalist far right (that also supported trump).

Musk literally supports the far right in elections all over the world. In the past few days he intervened in Germany in favor of the far right candidate. See https://www.lemonde.fr/en/europe/article/2025/01/10/musk-dou...