Hi @Saud Boujarwah ,
As per my knowledge, SharePoint does not support locking items in lists. Documents can be checked out/in but a similar concept does not exist for lists. I would suggest posting a uservocie here: https://feedbackportal.microsoft.com/feedback/forum/06735c62-321c-ec11-b6e7-0022481f8472. It is a place for customers provide feedback about Microsoft SharePoint products. What's more, if a feedback is high voted there by other customers, it will be promising that Microsoft Product Team will take it into consideration when designing the next version in the future.
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