It depends on the platform’s policy, so see what the “Terms and Conditions” section says about this. Still, it’s not generally recommended, as it may be confusing for contributors. At least, it may raise questions and doubts about the target sum amount.
Besides, running a crowdfunding campaign is a time- and effort-consuming process. To attract investors and reach your goal, you’ll need to manage social media, post updates on your campaign, and communicate with the people. So, as a rule, it’s not a common practice due to practical and ethical reasons. Shortlist some of the best crowdfunding platforms and then decide which one fits you most.