Missing videos in the search endpoint in Youtube data API

Question

There is a channel where I want to access its uploads and show it in my Website which is built using Vanilla JS; so basically when accessing the search endpoint it works correctly and shows the videos, but there is like 20+ video missing, the API manages to not include a major part of August's and all of July's videos and only show 3 videos in August (which are the last 3 which were uploaded) and June videos (from date 8/19 till date 6/26)! JSON which shows the month worth gap

Here is what I am dealing with:

GET https://youtube.googleapis.com/youtube/v3/search?part=snippet&channelId=UC7AbKZa30XPMInZIsViiBOQ&maxResults=20&order=date&safeSearch=none&type=video&videoCaption=any&videoDefinition=any&videoDimension=any&videoDuration=any&videoEmbeddable=any&videoLicense=any&videoPaidProductPlacement=any&videoSyndicated=any&videoType=any&key={YOUR_API_KEY}

I passed these parameters (perhaps any of them made or fixes this problem):

• order:date
• safeSearch: none
• type: video
• videoCaption: any
• videoDefinition: any
• videoDimension: any
• videoDuration: any
• videoEmbeddable: any
• videoLicense:any
• videoPaidProductPlacement: any
• videoSyndicated: any
• videoType: any

Any suggested edits to this question to make it better and more clear would be appreciated