Log into that created account and click the more option as shown below.
Post creating your Tiktok Ads account, kindly Click Event under Assets in TikTok Ads Manager as shown in the below screenshot.
Post selecting Events you will redirected to the below page in that select Manage under Web Events.
In Web events page click Create Pixel you will redirected to a code page as shown below where you will be able to find your Tiktok Pixel ID on the same code as shown below.
To Integrate the Tiktok pixel ID to Conversios Plugin:
Just add the above pixel id in the Conversios plugin as shown below and click save in the bottom left corner of the page.