I have a Mycare account but most of the results, from the many tests I've had, have never appeared on it.
The account is certainly capable of showing test results but this appears to depend on somebody proactively putting each result onto it, when the information comes back from the lab. It doesn't seem to be automatic.
Earlier this year for example, I asked the CNS if there was any news on PSA from the blood sample I'd given 4 weeks before, as it wasn't showing on Mycare. I assume she then enquired on my behalf, as next time I looked on Mycare, it had appeared.