Several months later…
I had just forgotten about this 
Looks like Liquorix kernel gets the cpu scaling right for this cpu:
6.1.4-lqx2-2-lqx #1 ZEN SMP PREEMPT_DYNAMIC Sun, 08 Jan 2023 05:16:01 +0000 x86_64 GNU/Linux
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.0 us
hardware limits: 400 MHz - 2.00 GHz
available frequency steps: 2.00 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.50 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 800 MHz, 700 MHz, 600 MHz, 500 MHz, 400 MHz
available cpufreq governors: ondemand userspace performance
current policy: frequency should be within 400 MHz and 400 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 1.80 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes
CPU:
Info: model: Intel Core i7-8565U bits: 64 type: MT MCP arch: Whiskey Lake
gen: core 8 level: v3 note: check built: 2018 process: Intel 14nm family: 6
model-id: 0x8E (142) stepping: 0xB (11) microcode: 0xF0
Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
L3: 8 MiB desc: 1x8 MiB
Speed (MHz): avg: 612 high: 800 min/max: 400/2001 boost: enabled scaling:
driver: acpi-cpufreq governor: ondemand cores: 1: 800 2: 800 3: 800 4: 500
5: 400 6: 800 7: 400 8: 400 bogomips: 31999
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Not knowing much about kernel builds, is this because Liquorix is differently build somehow?
Would appreciate your explanations/comments.