In a lot of countries, trial-periods are less of an interview and more of a "Firing you in the future will be incredibly hard, so we have a 3 month trial period where if you show up on time every day, you'll get converted to full time, and if don't show up, do zero work, and are an ass, maybe we won't convert you to fulltime".
In the US, when someone says "trial period", it usually means "extended interview" where there's a high chance of failure, while in other countries, the trial-period is a formality to make sure you're a functioning adult, but with no real chance of failure if you're not grossly incompetent.
For government/large corp roles, it's possibly a formality.
But for smaller orgs, the probation period where either side can terminate at will is very, very real. I have both fired someone during their probation, and walked away from a role during probation. It's not a formality, and just turning up on time and moistening a chair is not enough to pass it in many cases.
In the US, when someone says "trial period", it usually means "extended interview" where there's a high chance of failure, while in other countries, the trial-period is a formality to make sure you're a functioning adult, but with no real chance of failure if you're not grossly incompetent.