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

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 (https://github.com/microg/GmsCore/issues/1881#issuecomment-1427252013) - 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

Start by reproducing the blank screen after opening QrCodeScanningActivity and inspect the provided logcat and dexdump output. Compare the app's references to Google Vision and ML Kit barcode scanning, then verify that the QR-code camera loads and can scan successfully.