In theory, registering your systematic review with a repository such as Prospero (free) plants a flag in the topic that lets others know you are already researching it. You will have to write a 1-2 page protocol following PRISMA guidelines which can be viewed here. There are multiple places to register your protocol Such as Cochrane or Joanna Briggs Institute, but I recommend Prospero.
Should you decide to register your review, per PRISMA protocols you will need at least one official search strategy from one database for a systematic review and an official search strategy for all databases utilized in the case of a systematic review. Your librarian can help with this.