Could you please share a bit more about your issue?
Do you want to restore your deleted Environment?
Further, which license do you own for your sign in account before? A PowerApps Plan 2 free trial license?
If you want to restore your deleted Environment in PowerApps, I afraid that there is no way to achieve your needs in PowerApps currently.
Currently, within PowerApps, there is no option supported to restore a deleted Environment. If you want to get further help in this issue, please consider submit an assisted support ticket through the following link: