Practice questions help most when they sit inside a study plan. They show what you know, where you are weak, and which enterprise architecture concepts need another look.
The Exam Questions offer preparation material for the SAP LeanIX certification, and its SAP LeanIX course page lists what is available. Use Enterprise Architecture Consultant - SAP LeanIX questions as a supplement to the official SAP learning resources. Before choosing a practice resource, check which topics it covers, whether it explains its answers, and whether it matches the current certification requirements.
After finishing each study topic, answer a small set of questions. Read through your responses, work out why each wrong answer was wrong, and go back over the harder concepts before you try again.
For example, after studying application portfolio management, work through a scenario with redundant applications or outdated lifecycle information. Ask what evidence and stakeholder input you would need to make the call, and don't just memorize an answer.