We do not provide links, but common sources include NX Brew and SwitchBrew. Use at your own risk.
It looks like you're asking about Yo-kai Watch 4: We Are Looking Up at the Same Sky (often shortened to Yo-kai Watch 4++ or PuraPura) and specifically a version update labeled "2.2.0" — possibly with a mention of "free" and "NSP" (Nintendo Switch file format).
Even if you own a European or American copy, note that version numbers differ by region. For the Japanese version (Pura Pura), v2.2.0 is available as a free update.
