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then, after Russia's continued it's own missile attacks. he agreed to send them, without raising any concerns for depleted stockpiles of those weapons.

Here's a Google AI summary of the issue...
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AI Overview

Yes, at various times, the Biden administration did initially refuse to provide Patriot missile systems and other advanced weapons to Ukraine.

Specifically:

In March 2022, the U.S. initially declined to send Patriot air defense systems to Ukraine, expressing concerns about potentially provoking Russia.

However, in December 2022, after nine months, the Biden administration reversed course and agreed to send Patriot batteries to Ukraine.

In June 2024, the Biden administration decided to redirect the delivery of Patriot missiles that were meant for other countries to Ukraine. This was described as a difficult but necessary decision to bolster Ukraine's air defenses in the face of intensified Russian attacks.

It's important to note the shift in policy: While there was an initial reluctance, the Biden administration ultimately provided Patriot missile systems and continued to send aid to Ukraine. In fact, as of July 2024, the Biden administration was still announcing security assistance for Ukraine, including funding for Patriot system interceptors.

Recent developments (July 2025): There have been reports of the U.S. (under the Trump administration) halting some weapons shipments, including Patriot interceptor missiles, to Ukraine. This decision has been attributed to a review of U.S. military stockpiles and has drawn criticism.
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