They've been deprecating this for awhile....The preferred suggestion is to use a VPN (I use Zerotier which works great) or install your own tor proxy app on your phone and proxy thru that.

Honestly, long term, its better to go the proxy app route if you want tor...this enables you to tor-ify all your apps, not just Bluewallet....

Its a pretty heavy lift to ask app developers to include a full tor stack as part of their build.