Hi @Rastislav Janotka,
The SharePoint Framework (SPFx) primarily focuses on modern experiences within SharePoint Online and SharePoint 2019. It's designed to help developers create responsive, client-side web parts and extensions that integrate seamlessly with SharePoint's modern user interface.
At that time, there wasn't native support for classic SharePoint views within SPFx web parts. Classic views refer to the traditional SharePoint interface, which includes features like classic pages, web parts, and list views.
However, developers have found workarounds to integrate SPFx solutions with classic SharePoint experiences. For example, you could embed SPFx web parts within classic SharePoint pages using the "Embed" web part or using the SharePoint Framework Extensions (Application Customizers) to inject custom scripts into classic pages. Please refer to the following article
https://www.clearpeople.com/blog/spfx-web-parts-on-classic-sharepoint
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.