Yes. Triptherapie can guide a session when you bring your own magic mushrooms, but only as a harm-reduction tripsitter and not as official therapy.
Conditions apply: bring only a personal-use amount, consider legal options first, and you remain fully responsible for the substance quality, potency, and any testing.
I cannot verify your local laws, so you must ensure you comply with them and accept responsibility for possession and use.
If taste is a concern, many people find dried mushrooms easier to chew than truffles. For their perspective on policy, see this article on why mushroom services should be legal: read more.
Stay safe and make an informed choice.