Module development and code questions

I have got a view showing a table of rows of records. I want to change some table cell values after the view is rendered. So I thought hook_views_post_render is the hook I should implement in my module. I tried to change the cell values and they changed inside the implemented function ... however on the html page output I still see the old strings.... Means the changes I made have vanished.

I was/am under the impression that since the signature of this function is ...

Hello,
i am wondering how to keep Russian characters in the url alias that is generated by Drupal.
ex.

Спорт и природа

alias generated is = /sport-i-priroda
but i want to keep
/Спорт-и-природа

Any idea ?

Whether I put it in page.html.twig or writing a preprocess function, 

<link rel="preload" media="(max-width: 576px)" href="/themes/custom/mytheme/images/header-576.webp" as="image">

gets removed completely from the page source.

Only when I remove the as="image" the line is, of course without it, in the page source.

I have two content types (User and Company). 

Content Type Info Image

I want to create a filter that allows users to search by company name. Currently, the company field is a text field, but I want to list all companies as checkboxes.

Is there a way to do this in Drupal 10?

I am running a Drupal site since Drupal 4 days.............It got upgraded from Drupal 7 to 8 successfully and now it is running Drupal 10.

Before Drupal 8 I was having a block showing recent comments as table with 1. comment subject, 2. author, 3, node title and 4 date-time as fields. I had put code to change the node title to an alternate title (say title_mf which I have in a different table with additional/alternate data for nodes ... node_alt_data)

Hi all !!!