It should be noted that Iran has claimed to have sunk the USS Lincoln and to have captured several US soldiers, among other creative interpretations of reality
To take the claims at face value, local governments that has an interest to shift blame on Israel, do not believe Iran, due to their own radar data
It should be noted that, contrary to your, erm, creative interpretation of reality, that Iran has claimed to have struck the USS Lincoln, not sank it.
And where is the radar data that proves missiles were launched towards Diego Garcia, let alone from Iran? Iran BTW say this wasn't them - and as they say in advance where they'll strike, I'm more inclined to believe them than the deranged Trump, Netanyahu et al.
I was mistaken, sinking it was a claim by IRGC influence networks, not official statement. However official Iranian statements have claimed to have hit the USS Lincoln with 4 ballistic missiles, which is also an amazing lie considering these missiles accuracy and the state of the Lincoln.
My point still stands, the Iranian regime has a different standard of truth than most people. Its lies are wild and non-subtle, I wouldn't put a lot of faith on any of those.
Regarding radar data, these is the evidence countries have when approaching such a situation. You can safely assume that a country like Qatar or Turkey for example that finance Hamas, have no vested interest to believe Israel over Iran. The problem is even they have some limit to being spit on and calling it rain