Lost save data in PvZ 2

Hey! I started playing PvZ 2 back in 2020 in summer & I was hooked to it & since I got a new phone that years Christmas, I transferred my data from my old iPad to my phone & the game was linked to my Game Center account the whole time! & last night, I was logging back into the game after a while & then I realised I was at the very start of the game indicating that I lost ALL of my save data from before! I wouldn’t have done anything to cause this from happening so it was probably some bug!