By “knowledge” I assume you mean direct meditative insights, rather than simply conceptual knowledge, foreign names for linguistic streams of blah blah, or as Mingyur Rinpoche likes to phrase it: “bal-a bal-a bal-a.” If that is the case only a realized being can evaluate your progress. There’s this pertinent story about Padmasambhava that is exemplary:
“While demonstrating some of the extraordinary signs of his realization near the Mahabodhi Stupa in Bodhgaya, an old lady asked him, "Who is your teacher? To which lineage do you belong?" Guru Rinpoche replied, "I have no teacher and have no need of one. Neither do I belong to any particular lineage. I am a totally enlightened being, primordially aware." The old woman immediately responded by saying, "Oh, that's not right. Without the blessings of a teacher, you cannot be enlightened. You must have a connection with a master. Lacking that, no one will accept your words." He quickly understood the import of the old woman's statement in relation to making the teaching available to others. To demonstrate the supreme means of approaching the Dharma, "the Supreme Knowledge Holder" (Padmasambhava) began to seek out lineage masters and followed teachings according to their instructions. This indicates that even if you are already a highly enlightened being, it is still necessary to have lineage connections.” (“The Eight Manifestations Of Gurupadmasambhava,” by Khenchen Palden Sherab)
I should add that there are many, many Maras in this world who will jump on you if you utter anything smacking of a claim to having accomplished much of anything with your practice, no matter how sincere, dedicated, and long term it may have been. Ignore them. But if you feel that you have accomplished some stage or other on the path to enlightenment, evaluate your understanding against relevant sutras or tantras. If your understanding exactly matches what you read, then you are most likely fooling yourself, confusing a conceptual understanding for an immediate (not filtered by conceptual thought) meditative (actual meditation, not day-dreaming, or listening to someone droning on about something or other spiritual) insight. These insights do not map cleanly into concepts. Instead, evaluate how your practice affects your actions, thoughts, and affections. That’s where the rubber meets the road. But if you want to be officially recognized 🤷♂️ then follow Guru Rinpoche’s example.