Google Pay improvements

[OscarSpruit]

Description

This PR is a huge compilation of smaller PRs. These small PRs have all been reviewed.

Checklist

• [x] PR is labelled
• [x] Code is unit tested
• [x] Changes are tested manually
• [x] Related issues are linked

COAND-941

[github-actions[bot]]

✅ No public API changes

[sonarqubecloud[bot]]

Quality Gate failed

Failed conditions
74.3% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[dmengelt]

🚀