Currently running a b2b site built on Astra theme. We have sales reps on the road using mobiles and tablets that complain about slow admin processes such as searching for products, adding admin orders and all general back end admin processes.

- 1600 products with png images
- 100-200 active users
- 28 plugins, all kept up to date
- 0 php snippets
- HPOS enabled
- Regularly maintained and kept updated
- Caching enabled and regularly purged but my hosting doesn’t support Memcached or Redis

Plugins list:
Admin Columns, Astra Pro, B2BKing Core and Pro, Complianz, Cost of Goods, Elementor, Email Templates, Fibosearch, Fluent forms, Global Payments, Max Mega Menu, Members , PiWeb disable payment method, Webtoffee invoices/packing list templates, Woocommerce update manager, Woopayments, WP Mail Logging, WP Mail smtp, WP Rollback, Zapier for woo and Zapier for wordpress plus four custom built plugins designed for admin processes such as stock inventory control, profit reports and projections , UI improvements etc.

Any ideas that I can look into to improve loading speed and improve ajax lookup speed