The short answer: only if the encryption isn't up to modern standards.
The long answer: because quantum computers can operate in a superposition of both 1 and 0 (unlike traditional computers, which can only be one or the other), it means that they can "look through millions of potential solutions at once, rather than sequentially" as a traditional computer would need to (Stallings, 457, 2023).
This greatly amplifies the computational power and means that traditional public key cryptography leveraging factoring and discrete logarithm problems, such as RSA-based methods, are no longer secure. What would take a traditional computer millennia to crack will soon only take a few minutes on a quantum computer.
"Shor's Algorithm" shows that a powerful enough, and most importantly stable enough, quantum computer would be able to employ attacks such as those based on "Grover's Algorithm" to identify the public key and decrypt your VPN traffic in a matter of minutes (Stinson and Paterson, 342 to 343, 2022).
In the wake of revelations that quantum computers could obliterate traditional key exchange encryption methods, the National Institute of Standards and Technology (NIST) called experts to come up with ways to combat the issue.
The result was post-quantum cryptography standardization enabling VPN services to continue protecting your information. There were four algorithms identified by NIST to be quantum-resistant, with the most popular so far being lattice-based encryption methods. Employing a lattice of vectors for the key exchange, instead of a multiplication of two unique primes means that VPN providers can create thousandfold dimensions in which a quantum computer is just as useless as a traditional computer when it comes to decryption.
The encryption/decryption race is just another cat-and-mouse chase.