Is it possible to connect Notion with other apps (e.g. Webflow) using Bardeen?

We don't have an integration with Webflow.

You can check our current integrations at https://www.bardeen.ai/integrations.

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‍Yet, the easiest way to send or receive data from unsupported apps is to set up a webhook on tools like Zapier or Make, and set up a Bardeen Playbook/Autobook using the "Send HTTP /post/get" actions.
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This blog might come in handy https://nocodequest.com/webflow-webhooks-with-integromat/