Budget?
Used? New?
Most audio issues I've dealt for many, many years were resolved with 12th gen intel processor, 32g ram and nvme gen4 ssd.
Most of the machines with these specs or above have fast USB ports and usually 2 different USB controllers for those. That is a big plus for external gear in my view.

With this setup I can run BIAB with heavy plugins and simultaneously a DAW with plugins. No audio stuttering.
Mine is Thinkbook by Lenovo. To somewhat futureproof (for Audio!), I would not go below specs mentioned above.

If money permit, look at the current Lenovo Legion series. They are considered "gaming" laptops, but obviously could be used for anything. They are very powerful machines.
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Having said that, I am sure your current laptop, if it was made in the past 5-7 years, has at least 8gb ram and ssd, could very likely be tuned to run BIAB by itself (without heavy weight VSTi) without audio issues.