Our JustGiving search results update at midnight, so you should expect to see your Crowdfunding page appear in the results the day after it's activated.
You should search using the name of the page owner or key words related to their campaign. Crowdfunding pages appear further down the page in the list, underneath 'Charities' and 'Fundraisers'.
However, the best way for your supporters to access your page is if you give them the web address directly. Check out this helpful article to learn about the different ways you can share your page.