[com.gimb.paydirekt.app] giropay qrcode scanning not available

[tcecyk]

Affected app
Name: giropay (ex. paydirekt)
Package id: com.gimb.paydirekt.app

Describe the bug
in general the app is functional - but qrcode scanning is not available

To Reproduce
Steps to reproduce the behavior:

1. Login to App with your PIN
2. Click on QR-Code icon lower right
3. See blank white screen and no camera loading

Expected behavior
qrcode camera loading and able to scan

System
Android Version: 10
Custom ROM: /e/ Q / Lineage 17.1

microG
microG Core version: 0.2.28.231657-17 (9645c3e)-noen
microG Self-Check results: All ticked

giropay
version: 3.14.0-12558

logcat
the log is not verbose at all, so can't say if giropay is calling to Vision API or MLkit already (#1881 (comment)) - both are linked?

08-03 14:30:32.139  1474  3701 I ActivityTaskManager: START u0 {cmp=com.gimb.paydirekt.app/.qrcode.view.QrCodeScanningActivity} from uid 10164

dexdump

$ dexdump -d 'Lcom/gimb/paydirekt/app/qrcode/view/QrCodeScanningActivity' classes.dex  | grep '\.vision\.'
dexdump E 08-03 15:01:52 27272 27272 dexdump.cc:1962] ReadFileToString failed
23395a: 1a03 2a87                              |0019: const-string v3, "com.google.android.gms.vision.DependencyBroadcastReceiverProxy" // string@872a
233964: 1a01 2987                              |001e: const-string v1, "com.google.android.gms.vision.DEPENDENCY" // string@8729
23397a: 1a02 2887                              |0029: const-string v2, "com.google.android.gms.vision.DEPENDENCIES" // string@8728
37cebc:                                        |[37cebc] com.google.mlkit.vision.common.internal.a.<init>:(Ljava/util/Set;)V
5db9e0: 1a01 2b87                              |0008: const-string v1, "com.google.android.gms.vision.barcode" // string@872b
605b50: 1a01 2b87                              |0008: const-string v1, "com.google.android.gms.vision.barcode" // string@872b
37ce74:                                        |[37ce74] com.google.mlkit.vision.common.internal.MobileVisionBase.<clinit>:()V
37ce94:                                        |[37ce94] com.google.mlkit.vision.common.internal.MobileVisionBase.close:()V
37d004:                                        |[37d004] com.google.mlkit.vision.common.internal.VisionCommonRegistrar.<init>:()V
37cf60:                                        |[37cf60] com.google.mlkit.vision.common.internal.VisionCommonRegistrar.getComponents:()Ljava/util/List;
37cd88:                                        |[37cd88] com.google.mlkit.vision.codescanner.internal.GmsBarcodeScanningDelegateActivity.<init>:()V
37cda0:                                        |[37cda0] com.google.mlkit.vision.codescanner.internal.GmsBarcodeScanningDelegateActivity.onCreate:(Landroid/os/Bundle;)V
334fca: 1a09 2b87                              |0069: const-string v9, "com.google.android.gms.vision.barcode" // string@872b