yes

src/user-icons/test/plugins/support.test.ts

@@ -0,0 +1,13 @@
+import { test } from 'node:test'
+import * as assert from 'node:assert'
+import Fastify from 'fastify'
+import Support from '../../src/plugins/support.js'
+
+test('support works standalone', async (t) => {
+  const fastify = Fastify()
+  // eslint-disable-next-line no-void
+  void fastify.register(Support)
+  await fastify.ready()
+
+  assert.equal(fastify.someSupport(), 'hugs')
+})