Hello,
I came across an interesting link regarding Estonia that I would like to share with you: https://www.e-resident.gov.ee/become-an-e-resident/

I am curious to know if e-residents of Estonia are allowed to register a .it domain. Since only Europeans can register, I am uncertain if e-residents are eligible to do so. Would anyone happen to know?

I am not certain about registering a .it domain, but I typically use EuropeRegistry.com. While the cost of registering a limited European domain name is high and there is an additional installation fee, at least I have a domain.
They may require you to provide a trustworthy contact for your subscription. If you need further assistance, I suggest reaching out to their customer support team.

The .it domain zone is primarily reserved for Italian nationals, however, due to its resonance, IT-related project names are also commonly registered in this zone.

Eligibility for registering a .it domain name is restricted to legal entities that possess a VAT ID and a company registration number from European Union countries, including Iceland, Liechtenstein, Norway, San Marino, Vatican City or Switzerland. Companies located within Italy must provide a two-digit code indicating their province. Alternatively, individuals who hold a passport or identity document of a citizen from European Union member states, or an Italian Codice Fiscale (Tax ID) may also apply for a domain.

Registration requirements for .it domains include a minimum of 3 and a maximum of 63 characters; hyphens cannot be used at the beginning, end or in place of 3 and 4 characters in the domain name. All 24 official languages of the European Union countries are supported under IDN. Hiding Whois data is not an option, and DNSSEC is not supported. The possible registration period is 1 year. Customers must have an address located in any of the countries within the European Union, Iceland, Liechtenstein, Norway, San Marino, Vatican City, or Switzerland.

Once an application for domain registration or transfer has been made, the applicant receives a link to complete the process by filling out a form. In the case of a transfer, registration data must also be provided.