Belgian neighbour here.
My opinion is that the car needs to be charged to 100%, then driven to below 10% now and then.
Driving below 10% (after charging to 100%) is something I do when close to home, just in case it would fail like yours, to avoid being stranded during vacation.
We charge to 100% each time we go on vacation or longer trip (3-4 times a year). Give some more miles and don't think it hurts the battery really.
I believe it allows the BMS to recalibrate and be reliable. I do this in the hope the BMS remains correctly calibrated and will not stop the car like yours, way above 0%. I avoid going below 5%. (*)
That trip example is a bit surprising, and 62% needed seems high. But depending on outside temperature, can be normal. ABRP announces 50% needed.
View attachment 1030199
I recently drove 286km (180 miles) from 97% to 5%, with outside temperature in the morning (one way) just above freezing, and return around 12 degrees Celsius.
View attachment 1030198
Looks similar to my car.
Again, probably close to my car too. I calculated the battery lost around 12%. Not bad at this mileage.
(*) I avoid going below 5% more to have some range left in case there is a deviation, unforeseen issue or problem at the charger or on the way.