Is there anyone who would like to suggest anything?
Does anyone have any opinions on the matter?
I am(We are) open to suggestions from anyone.
もう少しフォーマルな状況であれば、いくつかの表現とニュアンスを紹介します:
Is there anyone who would like to suggest anything?
(何か提案したいことがある方はいますか?)
Does anyone have any opinions on the matter?
(本件に関する意見がある方はいますか?)
I am(We are) open to suggestions from anyone.
(提案を受け付けています。)