It might well be regulations for automakers, but on the other hand even common household appliances seem to have an extremely long leadtime, at least around where I live in the US. Several friends that had to replace large appliances (dishwasher, clothes washer or drier) and even HVAC condenser/evaporator coil combos had to wait for 3/4 months to get their equipment installed.
There is a choke on the system somewhere that is quite unclear to me...
Seems to be no shortage of those appliances here - but perhaps some of it is just labour for install or manufacture?
The pandemic killed some ~5-15 million people depending on how closely you associate a death with COVID infection. In whatever metric, this is not insignificant. Many of these people would have been retired, as COVID tended to affect those who were older the most, but no doubt many working age people were included in that.
So you have, let's say, about 2 million working who are no longer working. Then you have the long term sick. Those who ended up on ventilators, or those who got longer term sickness (often known as Long COVID, but it's more than one disease, and it expresses itself from mild symptoms to serious ones in all age groups.) In the UK it's estimated an additional 500k people are off sick right now than would otherwise be expected.
And then you have the people who decided that they were close to retirement and thought they would just take early retirement, or those who took the opportunity during furlough/unemployment to reskill or go into higher education, or perhaps they emigrated back home or took jobs in other countries.
All in this has created a huge labour shock - we have gone from an economy, at least at the lower skilled end, where many employers could pick a candidate within a few days of losing one, to one where vacancies can be open for months or in some cases never filled.
This is a great time - sans the recession(!!) - to be an employee as you have more negotiating power - but it is clearly having an impact on supply chains and productivity.
There are other issues with supply chains due to shipping container shortages and earlier in the pandemic air freight shortages due to fewer passenger aircraft flying. I am not sure how these are doing right now but presumably even if they are close to resolution they still have a longer term ripple effect as industries run short of parts to produce product 12-24 months down the line.