what , where and how modern warfare series - confusion

[ToxicMushroom]

so,-
a few facts-
somewhat new to this,- thinking i finally want to get in to it -

so, there is modern warfare -
1
2
3
-
1 remastered
2 remastered
modern warfare 2019 " soft reboot ish "
...
if all this is somewhat correct - good ""feel free to correct "
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then we have steam and battle net -
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steam has
1
2
3
1 remastered
---
battle net has
2 remastered
modern warfare 2019
--

if this is all correct -

1 , why is it so split between them-
i kinda expected it all be avaible on steam or battle net -
but splitting the remaster between them - odd

2. so,
i know not all likes the remastered ones,-
but i feel i would just go with them then ,
so i would be fine just buying remaster 1 and 2 .-
steam and battle net ..
then 3 modern warfare on steam ..
to then finally round off with modern warfare 2019 on battle net ??

if that make sens heh .-

....

all that said, i then plan to tackle black ops next - but we shell see..

any help on this - how to approach ,- thanks