Let's examine your argument.

In the first year of Brexit, exports dropped 12.39%. Largely a function of some of the punitive actions taken by the EU. The following year, in the midst of Covid, they rose 10%. In 2022 imports and exports surpassed pre-Brexit levels by a substantial amount.

So, the article regarding what went wrong with the British "volt" strategy does not extend to other sectors of the UK economy, which seem to be doing fine with regard to international trade.

Nor does the articles conclusions make sense.

There is no reason, why the British automobile companies can't compete in car industry by simply importing batteries from Germany like Fiat is considering doing based on recent talks between Tesla and Fiat.

If British car manufacturer strike a deal with Tesla whose plant is expected to be the most competitive in the world, it might give them an advantage over having an also ran battery factory that simply does not have the scale to compete.

Alternatively, Britain can offer nondomestic car companies attractive deals to assemble cars in England, that will provide it a host of good paying jobs.

England can gain many manufacturing jobs without owning the underlying IP by simply being a better place to manufacture goods and services. That is common in the US, where some states originate IP, but when it comes time to build the factory, they are built in states that provide a better manufacturing environment.