It's worth noting that Intel 4 only barely exists (mobile only and slower than Intel 7). Intel still is saying that they will launch 20a by the end of the year, and 18a next year, but I will be pretty surprised if they6 timeline sticks
Moreover, "Intel 3" will also be used for some I/O or cache memory tiles even in some later Intel CPUs where the computing tiles will be made with denser processes like "Intel 18A".
For now, Meteor Lake with "Intel 4" is the first Intel product made with a process that has been developed after the change of CEO. It remains to be seen later this year, based on whether the planned server CPUs will be launched successfully, then by the end of the year also the first CPUs with big cores having the first new microarchitecture since 2021 (Arrow Lake, Arrow Lake S and Lunar Lake), if Pat Gelsinger has succeeded to restore Intel's competitivity.
Capacity for the Intel 4 and Intel 3 processes doesn't build as quickly as 20A/18A, but that isn't surprising — the majority of the company's wins for its third-party foundry business have been with the 18A node, which Intel says is according to plan
18A process is planned to be ready in the second half of this year, and Intel is sticking to it. 18A chips (Intel processors and GPUs) will appear next year